Hello,
Thank you for your inquiry. What voltage and current are you going to be working with? If your operating temperature is going to be 20 -34 degree C we would only have one module that fits that. It is made by CUI Inc, and their part number is CPM-2F. Here is a link. https://www.digikey.com/short/p8p33z For a peltier you will have a set hot and cold side. If you reverse polarity the original cold side becomes the hot side and vice versa.
Thanks, Bobby