I've been looking at Samco hoses as well, but they're a long, long, long way down the priority list.
If you really want a race radiator have a word with Chris at Forza Italia. When I picked up my 888 from them they had a 748 in that had a damaged rad. They had got one of the race fabricators at Silverstone to knock up a top quality race spec one cheaper than an OEM one