Their not may like that in the UK.
You can get platinum's and i saw some in Corby last week for £8 a pair
The the featherfin gene is not rarely in the UK to well, but their are some on ebay in a Japanese blue guppy.
The problem is the featherfin gene make's it impossible to breed from. so u have to breed a normal male hopefully carrying the gene to get it back.
If you breed from a normal male you will not get any fry showing this gene, but their fry will.