Look up 2-key macro programmable keyboards, and maybe replacing the switches with low-profile ones, and you're good to go. Something like https://www.tindie.co

Look up 2-key macro programmable keyboards, and maybe replacing the switches with low-profile ones, and you're good to go. Something like https://www.tindie.com/products/anavi/anavi-macro-pad-2/ https://www.tindie.com/products/anavi/anavi-macro-pad-2/