A lot of pbtfans, gmk, epbt, nicepbt, & drop dcx sets would work.
Pimpmykeyboard & aliexpress also offer individual spacebars.

Unfortunately, Aliexpress and BangGood Links are autofiltered by sitewide reddit spam filters. Sometimes, users will be flagged and suspended from the Reddit platform as a whole due to excessive linking to this or other autoflagged sites. Please keep this in mind when posting or commenting.

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.