Gonna replace mine too while I can get to it easily... Apparently you can use one from a Mk1 Escort with minor mods...

...Superflex do an uprated poly item (part no. SPF1159K) about £35ish I think.

Obviously old one has to be drilled out and new one fixed with short bolts... but being poly you won't have to replace it again!!!

This is what i'm gonna do anyway...