A type K t/c is what you should look for. A type J t/c is also in the correct temp range for roasting, but I'd avoid using ferrous leads.
I performed that same search before posting this thread. I didn't see any in the listing that use the banana plug connection. They are all an "L" or "-" type connection. The have adapters but the spacing is not correct for my multimeter.
Two types of connectors - flat & round. My thermometer uses the mini-plug (flat type).
I usually buy these in lots of 5 for ~$90 from Omega. The good thing about my Omega HH-21 is it'll use type J, K, or T thermocouples. I use type T for measuring water temps and type K for roasting.
Handy not-so-little tool.