Try just applying and being honest, most outfits aren't going to cut you loose without training on their airframes anyway. I recently applied for a job working on Bell 407 medavacs with only fixed wing experience, and it's been a couple years since full time wrenching, and they were willing to train me. I ended up getting a flying job instead since I wanted to exercise my comm pilot rating so I didn't take it. There is a DIRE need for mechanics right now so I'd just apply, be honest and see where it goes. I don't think you'll have a problem getting a job very quickly.