Instructions for the Hackspace Manchester Infer Red Oven are on the Hacman Wiki.
The first bunch of PCBs I had made were a batch of 25 4 layer boards by a Chinese company called AllPCB and the total came to about $85, due to design changes and the ilk, I needed some more PCBs made after the redesigns, I needed some more boards made. With Chinese New Year in the way it looked like I would need to go with a UK company, RagWorm is a company who often turn up to UK geek events. 15 x 2 layer PCB came to about £180… and to be honest I feel that the AllPCB ones feel of higher quality (ignoring the extra coper), and at the better price point I would definitely recommend AllPCB and use them again.
The list of components I have got is here: Components list, it may save you hunting down farnell part numbers.