Hey, You can get them from Darren Bedfordunicycles.ca, Some people have gotten them from unicycle.com, and I have seen some from gb4. I got mine from Darren you can try mine if you want, call me.
you’ll have to put a different hub on the LX if you want it as a BC wheel
the platforms go on standard BMX hubs (which have 14mm round axles) but the LX has a cotterless hub (square taper) made for unicycle cranks…