5 axis mach4 tcp support

Hello all,
I have learned that mach4mill post processor and mach4 do not support tool center point, negating the use of my B and C rotary axis on my custom 5 axis cnc router. I was wondering if anyone has something to share on how they got around this issue? is there some post processor code available to add so that TCP is supported?
Let me know if you have any questions.