The difference between reverse mesh and formula mesh is that one has a staggered lip and one is completely flat. 13 and 14 inch meshies are hard to find in reverse but not in formula. really depends on what your looking for. you can machine the centres in a lathe and bolt the centres on the back so that the effect is the same as SSR mk3's and 2's. I was quoted $450 per wheels to have custom offsets. But that was with inner and outer lips so that you can choose the Width and offset you desire instead of settling for skinny wheels with high offset. but a easier alternative to getting 13" SSR reverse mesh is to get a 14" mesh centre and make barrels that are 13" reverse mesh style because reverse mesh uses a 14" centre on a 13 inch barrel