Into bikes sell as a kit- Tsubaki chain and either JT or chiavarelli sprockets-
http://www.intobikes.co.uk/products?...FQo2QwodHyj-bA
Seems reasonable to me (I expect delivery will be a tenner ish).
Is there a difference in performance between x and o ring chains? The kit with the o ring chain is £90+delivery. Adding mechanic labour for fitting, this'll bring it in under £140 for me.