For what it’s worth, I have had a partial solution on my FW13 since I got it - and it’s come in handy since it became one of my daily drivers with the Ryzen board upgrade.
I have a strip of VHB tape applied to the bottom of the touchpad’s bottom-left lower half, where a click button should go. VHB tape is double-sided adhesive, and the top backing doesn’t make a good finger surface - but matte Scotch tape does. I peeled off the backing and applied a precision-cut strip of matte Scotch tape (like the kind often found at an office desk, for patching torn paper) to it. It makes a comfortable resting spot for a thumb, and the nature of VHB tape prevents it from being detected as a tap, and pressing the tape-pad acts as a precise left-click without drift.
Leaving the right half exposed allows it to be detected as a right-click. The pad area serves as a null zone for my thumb to rest, as I idle my thumb on it while reading something, for example. It works adequately enough. It’s been on my laptop since I got it, and it hasn’t degraded in the slightest, with untold thousands of clicks.
I still continue to wish for a proper touchpad without a click behind the pad, and with 2 (preferably 3!) real buttons. I daily-drive a MacBook Air, and its haptic click is the most precise clickpad in existence - but it still feels like interaction friction.
The barrier to entry for an individual to source/create a touchpad is too high, I think, for an aftermarket option. Maybe that same barrier to entry is what’s holding up a new touchpad option. But also, maybe now that Framework has leveled out and got the new model out, … maybe they can work on this? I can dream, right?
(edit: I realized after posting that I already posted this early in the thread 
BUT HEY, it could use a refresh with many more folks posting their desire/trouble with the touchpad 2+ years later 
)