I did a web search before you posted, found them, and discounted them - because the website looked so swish I was sure they had to be expensive!
But very interesting looking company.
Regarding gold plating, I also had a look around the UK and found
http://www.goldplating1.co.uk/ in Bolton. Prices look really good - maybe I'll try a heatsink and see what they would quote for stripping and gold plating.