Lindsey Moscrop (Parker 21 Amy) can't get into this forum so he sent me the following:
"A few years ago I was supplied with a complete axle, hubs and brakes by Blue Line trailers who were the original suppliers of the P21 trailers.. They were most helpful and the cost was not high - approx. £250 plus VAT in 2009, The only problem would be any extra carriage costs. I was able to collect from the factory near Boston as it is only an hour away.
The axle is a standard part for 1500KG from Knott-Avonride The Knott Avonride data sheet gives detailed dimensions.
The refitting was very straightforward and the extra hub bearing seals which I specified appear to have kept the water out of the bearings for several years too. I seem to remember that the axle was complete with a set of brake cables and compensator plate too.
This will be the first year that I am going to have to touch the hubs as I have to do something about one brake adjuster. "
Blue Line Trailers ( blueline-trailers.co.uk ) and Knott-Avonride ( knott-trailer.co.uk ) both have informative websites.
Another chip of info for the Tech Library!
Geoff