You can get from Regal in the UK, Southampton based, but i think they only stock the actual intake kit. If you want my opinion you really could do with the rear heat shield as well (look at the OEM engine cover and there is a heat shield at the rear)
I got mine from the States directly and from one of Evolutions dealers, a tad long on delivery (about 2-3 weeks) but i ordered intake, rear heat shield and engine cover for just under £200 plus shipping which was about £30.