QLI's license expired along with all the others (except GT) when mongoose traveller came along, so they are currently out of print. However, Hunter Gordon is committed (well was last time I asked him on CoTI http://www.travellerrpg.com/CotI/Discuss/showthread.php?p=381907#post381907) to avoiding them disappearing into the same copyright canon hole that swallowed up DGP and has given Marc Miller permission to release them on a T20 CD. So it's just a matter of waiting for that to come out.