The good news about all of the Very (Very | Extra) Old Fitzgeralds is that, because of their elegant packaging, many more seem to have been saved and/or passed on than other bottles of their era, so there remains a decent supply. (I'm guessing non-bourbon drinkers -- and even "connoisseurs of fine bourbon" -- were saving them for a special occasion.) For the VVOF, I'm holding out hope that one will appear in the liquor cabinet of someone's parents when they pass away or move -- found a gold-filigree Old Weller Antique and S-W 90pf Rebel Yell that way!
I'm in possession of a Very Old and Very Extra (saving for a special occasion, go figure!) that only required shallow pockets and I've had multiple wonderful tastings of Van Winkle Family Reserve 15yo bourbon (an export-only 80's version of pure S-W that predates ORVW and Pappy 15). The Very Very Old is the only one missing, but I'm pretty sure I've got an idea of what it would taste like.
There's bourbon on the breath of the singer you love so much