Locking Gas Cap

I just noticed that there are intrigues out there with locking gas caps. Mine is just a simple flip open, without an electronic release. What years had these, or were they optional on all years?

my 2000 GL has a locking one with an electronic release, I sort of assumed they were standard features, but I dont know for sure.

My 2001 GL does not have locking gas cap, and there is nothing in the owners manual that says one was available for that year, so I think pre-2001 Intrigues had the locking gas caps and subseqent years did not.

Why would GM get rid of a nice little feature like that? I gues it would be too hard to retro-fit to my 01 gls.

I'd love to find a pre-2001 Intrique in a local pick a part junkyard (and there are many around Los Angeles) to get a locking gas cap (I can't believe it would be that difficult to retrofit), but Intrigues are so rare, i would probably spend days searching different junkyards and would be lucky to locate one.