Wouldn't 0/90/180 be harder to make than (at least an approximation of) 0/120/240 ? Reason I say that is that for a rotary machine, regular 3 phase stuff if common and cheap, to get 0/90/180 would need a custom wound machine. A static converter (i.e. a box with a few caps in it) will give you a 90° third phase - but only under no load - I have a Transwave example of that in the garage, and under load you can get quite a reasonable balance acroos the lines.I would also not use a cheap rotary converter, as these supply three lines at 0/90/180 not 0/120/240 phase angle so you still need to de-rate your motor
As I mentioned, a whike ago I was experimenting because we wanted a 3P supply for my mates home garage, partly to drive the 4 post lift we'd got hold of. Dad just happened to have a 5hp motor lying around which was going to be the basis of it - plus a few caps and an old rescued manual star-delta starter - the biggest probkem we had was getting it going ! I never finished it because my mate got divorced and the house got sold - so we no longer had a need for the 3P.
Sadly, that motor and the step up transformer were among the 400kg of motors I had to weigh in when dad died. If I'd had the room I'd have kept a lot of them.