I assume you don't have accidental damage option on your home insurance?
If you do you may need to dig the rmenants of the lens out from the bin.
I replaced my 18-105 with an 18-200, and it's a great all rounderWell I managed to grab a reasonably priced 18-200 today in another forum so although not ideal I guess considering my stupidity caused the issue I've ended up with pretty much the same 'quality' lens with a little more reach! Thanks for all the suggestions, much appreciated.