'89 Burban Delco stereo help?

I have an '89 Suburban that I'm putting a stock Delco ETR stereo back in. The harness had been hacked for an aftermarket unit that didn't fit well. I soldered on a stock harness and sourced an original unit. However, the power switch is broken (common problem among these). It's a push on-off type and when they break, they don't want to stay in the on position. I've tried to source a generic switch and have looked at other units for parts, but no luck. My stereo works great when it's on. Can anyone help me out with finding a used switch or somehow repairing this? Pics are below....