Can anyone suggest where I might be able to get the following, but in grey
(plastic):
http://www.screwfix.com/app/sfd/cat/...66665&ts=80341

(assuming I've not missed it on screwfix).

We have a busted corner of guttering on the garage that seems to be just a
few degrees less than 45, and a standard 45 degree angle looks like it won't
do the job. Suggestions for making a 45er fit, gratefully received too :-)

Not that I've tried doing this before, but a local roofer wanted £204 to fix
it and one other (dodgy sealed) bit on a straight section...

Thanks