Shortened rear springs for spax coilovers?

[Bournemouth James 0]

I'm going to have to wind my spring platforms up on my coilovers (on the rear) so when i fit my 9x17s they sit under the spring platform, I wont have to wind them up very far, but far enough to make the rear end a little too high for my liking

 

I've had a look on the h&r website and they do nice selection of springs, in different lengths with an inside diameter of 6mm, i presume thats the same diameter as my coilover springs

 

Does anyone know where i can get these h&r springs in the UK?, or are there any other companies that make shortened springs for coilovers?

 

Also, is there such a thing as lowered top mounts for the rear, or are they just for the front?

[20v turbo 0]

have a look at demon tweeks for the springs,i pretty sure youcan only get lowering spring caps for the front