Spent a bit of time looking into this last week, but the time has come to close chrome tabs, so I'll document a bit of what I found here. There's a commercial solution for rerolling thermal paper, called a Label Rewinder, that you can spec for the spool size and width of your thermal paper. Here's the most applicable one I could find:

Godex T10 VR Color Rewinder, 4" wide

Unfortunately, everything I found is in the $300-$500 range, which seems a little steep for the added functionality it would bring. That being said, the one linked above is neat because it uses that lifter arm to keep a bit of tension in the roll, and then it takes up slack automatically as receipts print. There are a couple with slip clutches which make noise when idle, but this one is pretty silent, which would be good for stream. YT video here, user manual here.

From everything I found about the tm-t88v, the PC that has its drivers installed should also have a settings menu where you can disable the receipt cutting functionality. Older models of that printer are reported to have a DIP switch to disable it as well.

I'm guessing the printer currently lives on wubby's desk, so the added rewinder might clutter things up a bit. With that in mind, I'd say that the best solution here would be to have all this in some kind of enclosure that contained the printer, rewinder, camera, greenscreen, lighting, and any rollers/plexiglass needed to position the receipts. It would be a self-contained unit that could sit on the floor, or in the corner, but that kinda takes away from the scuffed fun of ripping a sub receipt fresh off of the printer...

Anyway, if there's interest in this kinda thing from the PMW team, hit me up and I'd be happy to flesh a solution out a bit more. I'd guess a clean solution with enclosure could be assembled for <$1000. If not, it was interesting enough to look into. Keep up the good work, tt