Jeff, May I refer you to Vivek Iyer. He's on P.net.
Vivek, a nice man for sure, lives here in Holland and contacted me to ask for a test ride with the R-D1. He wanted to see the UV and IR capabilities of the R-D1. On our first shot we came to the conclusion that the R-D1 is more than capable in both UV and IR.
He planted the IR bug in me, and he fed it by sending me gratis a home made 715nm IR filter.
Vivek is also deeply involved in UV photography. Contact him and see how he solves such problems as unavailable (or hugely expensive) filters.