Hi Shadow_ooOO

You can get the tritium kit markers here at

http://www.johnbullclothing.com/accessories.asp

and betalights here

http://www.shop.edirectory.co.uk/penrith_survival/55/mia/pid/242045

I guess it must be a bit easier in the US to get yourself some U235 or Pu than in the UK. You would have to buy quite a few betalights to get enough to build yourself a tritium boosted weapon though.