Thanks to you both..

I basically need a subframe, lower arms and roll bar for mocking up purposes, none of which will actually be used in the final build - but thanks for your offer of the arms Jon!

Length of the arms must be the same then, which is surprising because I thought the hubs were pushed out for the wider track width.

So if I get a standard subframe I will need FRS brackets for the rear lower arm bush? or in actual fact because I'm potentially not using it in standard form eventually it won't matter..

Ben