lost my gas cap

I see them on his website for $59 and $79

http://laysons.com/Catalog.cfm?nCatID=2565&nModelID=5&nModelYear=1965

I got a flat chrome locking one from someone on Moparts for $25 that fit perfectly. Had been waiting to see a locking cap to replace my old wore locking cap for about 2 years. THen the right deal popped up.