Having dealt with Andy the chain man on a number of occasions for both my Laverda and various Honda's I can recommend him, what he doesn't know about chains isn't worth knowing. He matched up my balance chain and saved me potentially over £200.
If you send him your chain he will match it with a race chain, he only deals with quality chain, nothing made of string!
He's worth a call, his number is 01299 403688. He also has a website.