I have recently got a 1988 Autosleeper VHT touch wood all is going well so far apart from the water tank cap which has broken. I was just wondering if anyone know anywhere that sells replacements. I tried the autosleepers parts dept. they didn't know of anywhere.
The filler gap is 5.5cm across
The cap inside across is 6cm
The lock section of the cap is 4.3cm
Pictures here:



Thanks for your help.