Aftermarket axles, green bearings and thrust block

Well then you have three choices; move the lip, cut the axles, or pull the T-block.

There is one other choice, which is the same as manufacturing spacers. You can pull the bearings off and put a collar on there first.In fact, if one wheel is looser to the lip than the other, you can put the whole spacer on this side. But it will pop the drum out too, so you will have to machine the ridge off the unworn part.