Tritium isn't "that" radioactive.
I have a wristwatch with tritium in it, granted I see your point. I'm not sure I'de trust just anyone to deal with it properly..
That said, in these amounts short of eating it... you should be okay.
Anywho, there are illuminated ACOG options out there, they are all slightly off spec, take batteries, and are around $100
http://shop.ehobbyasia.com/accessori...se-4x32ce.html