Bafang M620 Crank set for Fat Bike - HELP!!!!!

[PaMtnBkr]

So I have a Bafang M620 on a Carbon Fiber Dengfu FS Frame that I can run either as a true fat e-bike 26 x 4.8 Tires or I can run 29+ wheelset. Awesome option to have! My issue is that I need a new crankset and the M620 uses a proprietary spline similar, but not exactly like ISIS. I can find cranks for the M620 but I need enough offset to clear my rear swingarm. This is why I need an EB11 Bafang crankset, not the EB06. Any help will be MOST appreciated! Thanks, Don