The other is a Canondale, approximately 20 years old. Triple Shimano 105 chainring with 8 in the rear. 

I had been using it on a trainer in previous years, but not for the past two winters. The chain was rusted solid and, when trying to get that replaced, was reminded that the rear shifter had slowly stopped working, and no longer will shift into lower gears. According to the bike tech, it’s not a readily available item, and replacing it along with the cable would cost at least $150. This was more than I wanted to spend, but maybe it’s not more than you would be willing to spend. Or maybe you have the parts or want it for parts. 

Both are available for free. 

Let me know if you want more details.