This has a standard towball fitting and 7 pin light electrics which may have been converted at some stage?maybe not?Richardsons can supply some parts for different models within the same era-up to 1967,However,I have been lucky and found all new drums/ braked hubs on axle like Robert suggested,off the shelf,surely if they were illegal,then the parts should not be made available?(These are not That cheap though)
I would also like to ask,why are there so many of the older trailers still being used today and still being sold everywhere,like loot,friday ad,farmers ads,the horse exchange,ad trader,exchange and mart,and of course ebay to mention just a few?