You can probably find that info. in history books of WWII or Malta. FWIW Warbirds has just such a map, and I think you can download it from iEN's website, or one of the independent resource sites that they have. (You should be able to open it with Paint Shop Pro or equivalent program). I have lost all that info, so you will have to fish around the iEN (Warbirds) website. Most players thought the terrain was crappy (and it is), but I think that the placement of airfields and vehicle bases is correct.
While you are there, you might want to check out their forums page as well for advice on maps. Anyone can post there.
Aces High must have just such a map, because we had a scenario (Fire Over Malta) recently.