You don't have to wait on me! With the FMOD tools and a free audio editor you could literally make your own sounds faster. It's a lot more work for a complete sound pack than it would be for one aircraft, or vehicle. If you're doing it for yourself you have the luxury of being able to use any sound your find, but unless you own the copyright . . .
EDIT:
BTW, I didn't learn that I had a problem with guns until after I had all the recordings done. The original sound pack is washed out of some of the impact that guns really have. It's partly because of the difference in human hearing (analog) and the recording devices that we use today (digital). Gun sounds and engines off of YouTube will not be as high quality as they would be if they were properly recorded. This is one reason that Hollywood sounds are so much richer (they can pay to have an airplane or vehicle rigged for audio). It is also because the mics I use, or have used in the past were low SPL. A higher SPL mic (think snare drums) will record a truer sound. Obviously, that type of mic is not available on a cell phone, or low end digital camcorder. I have very nice mics now, but it is not very likely that I will be able to go to TankFest again, and it would probably take more than myself and my wife to collect the sounds in even a two week period for those tanks. I will do what I can, though.