Alternative to Xume magnetic filter holders

[ianmarsh]

I've just come across Xume quick release magnetic filter holders. They look to be a very good idea but they aren't cheap. Has anyone found a cheaper alternative?

http://www.xumeadapters.com

 

[sarahhj]

Great idea. I do recall coming across these a while back, and I've not seen anything similar since. I'd be tempted if it wasn't for the fact that I no longer use screw-in filters.