Multi Axes, dual loop, differential force

I have an application that requires 6 dual loop axes, SSI position for primary loop and Force(dual input, diff) for the secondary loop. There are also 2 axes that are single loop, SSI position control.
I have been unsuccessful in finding any combination of modules for the RMC151E that will accomplish this, so I looked at the new RMC200, but, alas, it is not yet available.
Anybody have any suggestions how I should go about this?

Do all these axes need to be synchronized? We can put all 6 position force axes in one RMC150. However, we have announced the RMC200 that can.
WHat is your time frame? We are ramping up production of the RMC200 now.