I just got some
1/2 dram bottles to check - Diameter is fine, the length requires a longer tube (
ghost protocol style) and the lid is flat on the inside (no insert tube on cap) so it can't just be cut down without some type of gasket, etc. I'm thinking the right size of nylon insert glued into the inside of the cap may work - just not tested yet. The 3ml plastic dripper bottles have the same issue with the length of the tube, but do thread into the original cap - I have not confirmed that they work yet.
Sadly, even though I've gotten everything together to start playing in the shop, a couple of trips to the hospital have stopped progress on this for me. It may be a while till I can fire up the shop again. Right now, I'd say the 3ml dripper bottle is the best bet, double the capacity seems to make more sense. Check the ghost protocol thread for instructions on that mod - should work fine on the G-LV.
If I get a chance to work on it, I'll put the info up as I test it out.