Brian James Trailer Tyre Rack

Bit of a random question ... I am pressing an aging Brian James RS5 Race Shuttle into use to transport the Rally Car, and really need a tyre rack built into it ... Contacted Brian James directly, but they can offer no assistance for a trailer of that age.

So I'm going to need to get something made up .... so
A) does anyone have an RS5 with a tyre rack in it that could send me some photos
B) can anyone suggest someone for this work, i'm near Woking but realise i may need to travel