Towbar and trailer.....?

[Leicester old toy shop]

Hi, i'm after a towbar for my 87 LHD F4 van and also possibly interested in a trailer made from the rear section of a van if anybody can help? Have seen these a few times and would assume that they would be made out of a rotten donor van? Also would like some new doors and wings and possibly going down the uprated engine route in the new year, so any advice would be greatly appreciated.
Thanks!