I built my UV triple using the horrible P5 from GB I reviewed here:
…and a set of the 3535-sized 395-400nm UV emitters from an eBay seller. Depending on the emitter you go with, as in my case:
If you are selecting an existing light to use as a host, try to get one with the XP-sized emitters instead of the XM-L sized. The first light I tried to use as a host had the LB XM-L-style emitters, and I couldn’t get a board to fit my XP-sized emitters to fit. I had trouble finding a decent and inexpensive triple host for my build. For a purpose-built light like you want, I’d suggest looking at the newer SRKs with the counterfeit XP-L emitters. Those can be had pretty cheaply in some cases. You should be able to reflow your XP-sized UV emitters onto the original board, and since the fakes are driven fairly weakly, you may be able to use the factory driver without mods. I would also count on having to find a way to improve heat sinking, either with some potting, or via an added metal plate.