Someone on eBay sells a tool for 8 bucks designed specifically to push out stuck pistons on a Maytag engine. It's a spark plug that has been gutted and has a grease fitting on the end and block off plate for the exhaust . . . the guy selling it says he's restored these engines for years and never found a Maytag piston he couldn't push out with this tool and a grease gun.
The pictures of the one that was stuck for $99 look pretty good. It's all there and even has a small amount of what looks like the original paint. But by the time I drive to Colorado Springs and back, I could probably buy a restored one locally for less money. I'm still shopping . . . one is out there somewhere with my name written on it.