locking fuel cap. will this fit?

looking for a locking fuel cap for my 73. experience has taught me that often the parts are early ones.
my bus has a petrol flap so does it mean i need an early fuel cap like this?
http://www.justkampers.com/211-201-551-c-locking-petrol-cap-stainless-steel-for-vw-t2-1967-1971.html

 

That look like the one I would think you van has, always worth a call to them though

 

good thinking! will do

 

Called jk this morning and was told it would fit. later today i got a reply to my on site query telling me it wouldn't and would need this one instead
http://www.justkampers.com/867-201-...or-beetle-1967-1971-and-t2-bay-1971-1973.html

it's no wonder i get confumbulated

 

Brilliant customer services! At least one of them has no more idea than you. lol

Maybe someone will be kind enough to go and see if they have either of these caps on a flappy van.

 

Got mine (for a 73) from megabug after finding out that most of the advertised to fit didnt. From memory it was well under £20 delivered

 

My 73 single cab has a flap and the prototype bay one fits.
The later one us flat and sits fkush to the body