John, thanks! That's what I needed to know!
Thomas, the plans call for 2, 22" x 29.5" salvaged glass tops. However, I'm considering surfacing the
oven side with tile (as pictured in someone's build) to use as a warming area. One thing I've learned about Craigslist, is that patience always wins the day. If I'm diligent to check daily, I eventually find what I'm looking for at a price I'm willing to pay. The other option is to check Habitat for Humanity or some of the area appliance repair shops. I haven't gotten that far yet.