i just put a gsr support panel in the jumbuck, from cwolf old shell that i lopped off before he threw it out (same shell i got the tailshaft support from). It is the same depth, well it takes the same height radiator.
My evo intercooler piping went through the proton gap beside the radiator without any mods. just had to cut away the part of the panel where that big airbox thing is to get the other pipe through.
so, ben. if you want. i have a buggered proton rad panel, with evo intercooler mounts that are salvageable. I also have a good gsr fan, complete with mounts that would need to be welded to your bar.
I have not got the brackets to support the front bar up near the bonnet, or if any brackets are required for oil cooler bits, i dont have.
just as a aside, i dont have a rivnut or nutsert tool. I used the flare nuts or flanged nuts, the ones with the washer attached. I drill a hole and tap the nut in till the washer part is against the panel, then weld the washer to the panel. there is about 1mm protrusion and if thats too much its pretty easy to tap it down a bit lower.