Depending on how much you want to spend there are alot of options for Caps. I had a WootingTwo for awhile and had a few caps that worked. https://smile.amazon.com/dp/B07BTBRHTW/ref=cm_sw_r_cp_apa_glc_fabc_83HQ6XDYY59H4G5SFP7E?_encoding=UTF8&psc=1
I had those for abit, I have had Taihao on my Wooting. The thing to look for is to make sure the spacebar and modifier keys (shift, capslock, tab, ect) are the correct unit length and they are cherry mx stem mount on the set you are buying.