SkunkHunter, have you looked at the LumaPower Incendio V3+? It uses 1 x CR123 and pushes out up to 350 lumens. It even has a forward tactical clicky. Dimensions (L X D): 3" x 0.85" (77 x 21.5 mm). Which is what I'd consider quite small.

batteryjunction.com usually has them in stock (and is an excellent shop for torches and batteries in general).

Have you considered rechargeable li-ion batteries? Rechargeable cr123 will give you much better value than AA or AAA (either alkaline or nimh), and since they are li-ion they have a much higher energy density.