Petrol Cap Differences?

[Dickie 4]

Wanted to fix my Petrol Cap today as the existing cap has been damaged and the lock is knackered. So I picked up a full lockset from a breakers but quickly realised the two caps have major differences. The one on the right is the cap that fits, the left one is from a CJ. Question is how do I get the working cap to fit. The filler hose itself has a metal collar fitted to it thats attached with 4 screws. I'm thinking the one on the right is an aftermarket item. Any help would be appreciated.

[sensualt101 31 1 Cars]

my gti's cap is like the one on the left in your pic above and all 3 of my 205's have had the same type! i havent seen the type on the right before?

Edited February 15, 2012 by sensualt101

[Dickie 4]

Thats what I was thinking. I'm working on the car again tomorrow, and I'll investigate under this collar to see if it's a quick fix.