Check out the Poulan 455 & 655 which are Pioneer saws. Those came with chainbrake or brake provisions. However they are an old saw from the 80's.
Thanks for all the info, gentlemen! I went ahead and checked out both of those models and they're made by our good friends in Canada, which is good enough for me. They seem pretty few and far between on eBay, so I'll keep my eyes open for a decent one.
Sawtroll, thanks for sharing your knowledge of Stihl saws. I'm the same with Ford parts interchange info as you are with motor-saw info, so I can really appreciate you taking the time to learn it all.