I just signed back up to BLAB, been a few years but WOW, love I saw this new Forum! Be good to add links here for wagon sites and other boards and suppliers just to have all info in one place! I'll add a few links then I have to go to work.
http://scalemodelhorsedrawnvehicle.co.uk/

http://scalemodelhorsedrawnvehicle.c...Suppliers).htm

https://www.thespruce.com/custom-hor...0-ab_gsb#step5