You can find a wide variety of keyboard covers by typing ‘MacBook Pro keyboard cover touchbar’ or ‘macbook pro keyboard cover without touchbar’. They have different colors if you’re into that. Most of them are pretty much the same. It’s molded to fit both the 13” and the 15” MBPs.
The one I bought was
Kuzy - MacBook Pro Keyboard Cover with Touch Bar for 13 inch and 15 inch (Apple Model A1989, A1990, A1706, A1707) 2019 2018 2017 2016 - Clear https://www.amazon.com/dp/B01MSNQUQT/ref=cm_sw_r_cp_api_i_UhF1CbPHY96RX
Not an endorsement. It just happened to be the one I chose randomly and it worked for me. You can choose any of them.