They seem to not be made anymore, but if you can find one, the Triopo RS3 with a QR clamp attached will set you back about £40/50 quid. Small/light/cheap though, unfortunately, I cannot tell you what it will support as my Canon 800 F5.6 L IS + 1Dx is simply too light! My 4 Series Gitzo tripod is a bit bendy too. Please read that again - I am serious. See attached file (with my ex 600 F4 L IS) and note how out of balance it is set up - result was zero creep.
This head is so small and light it is what I use on my traveler tripod yet it will happily support anything Canon/Nikon currently make. If you cannot find one then have a look at the Sirui K--X series heads, a bit more expensive but the lockup is nearly as good and the ergonomics/controls are better.
As to the "Chinese copy boys aren't all over this like a rash!" ? They do not (in my experience) make ball heads as bad as the Manfrotto offerings. Manfrotto make many great products but I do not include their ball heads amongst them - just my experiences.
The Manfrotto Hydrostatics are reasonably good but will not hold loads like the Triopo RS 3 will. A (pro photographer) friend of mine has a 468 (with the 410 type clamp) and it is big, heavy and very expensive - though it does have adequate lockup. The OP was looking for something cheap which the 468 is not. It is over 8 times the price and 2 and a half times the weight so I don't think it will fit their needs. Another friend has the smaller (Midi) 488, still a substantial head, but that won't hold his camera with a 24-105 without sagging - so it is not much use either.
For reference my other Ball Head is the Sirui K40X (a bit of a lump!) and even that will not hold what the RS 3 does! I have tried out quite a number of American, Swiss and Italian ball heads but have been disappointed in their performance compared to their price and weight. I have no knowledge of the other Triopo models as I haven't tried them, but I have yet to find something to compare with their RS3. Pity that they seem to be getting more difficult to get.
Just my experiences.
I've got one of those sat in m y spares box, doing nothing. Happy to let it go if OP is interested.How about the smallest of the Pig Iron range? I have that plus the middle one and find them excellent value for money.
Huge thanks to everyone who's taken the time to reply. I'm probably on a loser here, as I thought the head that came with the mini tripod was quite heavy, but having had it on the scales it's only a quite paltry 250g (excluding the QR plate). Having owned one years ago, I just really liked the quick release lever on the Manfrotto........ as per usual, photography = ££££'s......![]()
I'm not suggesting the 468 Hydrostatic as a suitable option for the OP, just reacting to your blanket statement that Manfrotto doesn't make good ball heads. I've reviewed loads of tripod heads for my work - several dozens, I've lost count - including many Manfrottos and a couple of examples of the 468 and they're notable for an unusual combination of locking strength with fine control afforded by the Hysdrostatic system, at a very fair price. I rate the 468 highly (the newer M'frotto 057 series are also pretty good) but I don't know where you get your numbers from - 468 is very similar in weight and price (£129 at Park Cameras with Arca-Swiss QR) to the Sirui K40X you're suggesting.
But the OP is looking for a cheaper alternative to the M'frotto 494RC2, with QR plate, which is a small and fairly basic head - 320g and £60. There are alternatives, but nothing I'm aware of in the same size/weight class with QR plate that's significantly cheaper or better.