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all shimano flat mount calipers use the same pad size
You could use:
https://www.bike24.com/p2303937.html
without fins: K03S Resinhttps://www.bike24.com/p2142762.html
k04s metal -
K04s, K is the finless version of L pads, 04 is sintered (03 is newer resin) S is steel backed or as you're an obvious weight weeny K04ti. I think there's an XTR that uses this pad shape but most MTB and some older road use G or J, with older older stuff on B or A, 4 pot stuff is obviously different.
R785 uses G04S