'95 Klein Pulse, '98 Klein Pulse [Single Speed], Mosh (Gaint) 24" bmx cruiser
I used some flat washers (not sure what size #10 or 1/4" I think) that just fit inside the crank without covering the crank threads, then used an old park crank puller for square taper.
It bent the washers but it did work!
I would only do this if you can't wait for the right tool, just be careful!
I bought a pedros crank puller that has changeable tips for square or splined - works great!