It needs:
4x Allen M3 x 40 mm (or 36) bolts
1x Allen M3 x 60 mm bolt
4x Allen M3 x 12 mm bolts
2x Hex M3 x 120 mm (or 100) bolts (i)
11x M3 regular nuts (ii)
6x M3 washers (iii)
2x springs (iv)
(i) These are not easy to find, M3 threaded rod with two nuts on the bottom side and one on the top side should do the job.
(ii) Better have 15 or more nuts.
(iii) Better have 14 or more washers, in case you want to add another 8 to fix the clip to the gamepad.
(iv) They should be 30mm long and fit around a M3 bolt.
You have to print one of each piece except for the Beam (2 of this).
Works for any phone over 70mm wide and could easily be used with wider phones as long as the vertical bolts are long enough.