Their number is 01763 274909,they are based in Buntingford ,Herts,I did have to buy a bipper spring coil to send to them to make a reinforced copy of as I couldn't take one from the van as it was in use but would happily send it to someone at a cost but am sure they have it on their system now as they told me they never made one before,it cost me around £250 to get them both made but money well spent.