You may also try this: http://www.sprucepinebatch.com/GloGlass.html
It's primarily for blowers but see if you can find anyone there with a clue as to its suitability to your purposes...
Zentrum Glass is right in my back yard here in MO. I had the opportunity to go over to Doug's studio (which was worth the trip - he's self built 98% of the equipment he has in that studio) and hand pick my sheets and stringers of uranium glass.
I've run several tests with this glass over the last 5 months. It's not fusing compatible with COE 90 - you'll need to use COE 96 and even this combination can be touchy, depending on the uranium to 96 glass ratio. So far, I've only tested it with Uroboros 96 frits - clear - no colors yet. I've been working mainly on figuring out the temp/strike point factors and the range of temps needed to achive varying melts.
Doug's sheet is a bright clear cathedral with a limey yellow green color. Pretty spectacular! You can retain this bright original color if you fire only to a low-low temp tack fuse - 1290-1300F-ish. When you fire it above this temp, it strikes to an opaque creamy yellow/hints of green color with a pinkish orange interior center glow. It's a very interesting glass.
It's black light induced fluorescence is wicked bright! Great for special effects.