Yes you can get one for the MPI however it has been known to have a fitment problem if your vehicle is fitted with ABS, as the ABS unit is in the way slightly. Can be remidied however.
If you dont have ABS then it shouldnt be too much of a problem
There is a big disccusion thread on this which includes pics of the brace you need to buy. Here it is
Seeing pics of ABS on Sei's and physically trying to fit the brace to my MPI, I'd think it would not fit and ABS model.
The reason for the mpi brace was to clear the airfilter box (higher TB) and ECU, which was in the way.
I was not happy with mine though, and got a novitec to try and fit involving some modding. The novitec defiantly fouls the K&N though, but on wed I pick up a GSR of oldschool, which should solve that problem
OPM MPI, did i rate it?.....no...i'd sooner save a few ££ and get the spi, and move filters and ECU. You'll have to mess about no matter what, so go for a theoretically better and cheaper brace, and make it fit