The guys name is Andy who is selling these on ebay. He says he will do a set (- rear ARB) in red, blue, yellow, black, nautral and green for £99.00 plus postage "buy in now". He also tells me that he designed them for Flo-Flex and Deflex and has improved on the design since over the years?

He does have a few ebay accounts though:

poly-marine
poly-speed
poly-speedclassic

have to say im tempted!