Mx5 subframes

[Numplumb]

Hi has anyone used or thought about using mx5 subframes complete with wishbones, steering rack etc as used in Mev Exocet instead of fabricating bones or just Mx5 bones with brackets.
I have been reading up on the net and there doesn't seem like there is much difference in sizes either way, the reason I'm asking is because I'm altering a chassis which was built for Sierra donor and I have not bought any bones or brackets yet.
Any information would be appreciated Mick.