Perhaps consider other options which don't require large force. I'm currently running a normal aeropress, from before the VC buyout, with a Fellow Prismo + paper filter, and i'm getting results which I'm very happy with. I use my forearm to press rather than hands. I've been happy enough i've avoided building a Gagguino[1], which I'm a super big fan of despite my distaste for vibratory pumps.
For no heater or lever, this compares relatively poorly to a Flair[2] in my eyes. I've found all this coffee stuff to be highly available used at a discount all along the Atlantic coast US.
[1] https://github.com/Zer0-bit/gaggiuino
[2] https://flairespresso.com/product/flair-58/