Many thanks to the TMS museum who saw my post inquiring about the U7 2716 TinyBASIC ROM image for the MPF-1 on the Vintage Computer Federation Forums and sent a dump of his version to me! I got permission to share it here.

I hence would indeed be able now to run the MPF-1 in original "BASIC-extended" configuration - for now, I'll leave my 2732 Monitor + TinyBASIC EPROM installed in U6 though; another 2 KBs in U7 is quite useful as well.

But, I needed to test the new ROM of course, and hence put it in a 2716, changed the J1 settings - and indeed, this ROM image works great. I can start BASIC from 0x2000 as well now. Awesome!

The Jumper J1 settings for a 2716 in U7 are: 1-2 3-4 5-6. As stated previously, for the 6116 extra 2 KBs of SRAM you'll need to set J1 to 1-2 4-5 6-7 instead.