That's what I came up with as well.. I got a couple of extra SA spacebars from pmk to practice cutting and joining them at the right length, but I'm afraid the join will be too obvious.
The last time I saw anything 3d printed it came out fairly rough, have the printers improved that much in the last few years?
As a last resort, I suppose I could create a mold of the SA profile space keys I cut to the proper length and cast an acrylic artisan pad on top of the space keys the board ships with.
Need to make sure Mistel offers replacements before I try that though!
Thanks for taking the time to reply!