I need help locating .22LR ammo for disabled students

I'm trying to line up various defensive shooting classes for disabled and/or handicapped students during 2014.  I usually use .22LR handguns for this purpose, as students can handle the minimal recoil even if their disabilities are significant.  I was lucky enough to trade into a couple of cases of .22LR ammo late in 2012, which made last year's classes much easier to arrange:  but this year is looking bleak.  I don't want to switch to BB guns for training, because they lack several features of 'real' firearms:  but if I can't find ammo at a reasonable cost (students on a disability income can't afford scalpers' prices), I may have to.

Can any readers help me?  Here's how:

• If you have contacts at any ammo manufacturer or wholesaler or dealer, and think you can arrange for them to sell me a couple of cases of ammo for this purpose at affordable prices, I'd love to hear from you (my e-mail address is in my blog profile).
• If you have a brick or two of .22LR ammo that's surplus to your requirements, would you consider donating or selling it for a good cause?  Again, please e-mail me.

I'd be most grateful for your help.  The only conditions are that the ammo should be reasonably reliable (powerful enough to operate the mechanism of most semi-auto pistols - some cheap ammo isn't loaded to the right power levels to do that) and accurate (in other words, shoot to point of aim rather than scatter its bullets about like shotgun pellets - don't laugh - some cheaper brands have done that, in my experience!)

Thanks in advance for your help.

Peter