John - if your Airshield that's not working is one of the pre-"Pro" versions, I might be able to help you with parts to get it working again, as I was given one that the helmet itself broke but the motor was still good, and I made a AA-battery holder to replace the stock rechargeable battery (the one that looks like a pack of Marlboros with a plug sticking out the top like you're taking one out ... I know, pix would help!) The holder takes 3 x AA batteries - I used Eneloops (the rechargeables which hold their charge even if sitting unused for a couple of months) but regular disposables work fine.
So this is an offer - if you are interested in trying to fix the one you have, I'll see if I can get the motor out of the cracked shell and send that and a battery holder your way for the cost of postage.
Won't get you a new Airshield, of course, so you won't get the pleasure of unboxing a new toy tool - but it will save you a bundle of $$$