I know this is a long shot but in the 90s, I was a girl scout and received a pegasus plushie for selling (x) amount of cookies. For some stupid reason, I gave it to Goodwill, probably in my brief spurt of "plushies are for kids (and absolutely not me, I'm not a kid anymore, no sir)."
In my wildest dreams, I would love to own another plushie, but I'd settle for photos. I loved that pegasus plushie, he was always the hero when I was playing
That's such an adorable plushie, but that's not the right one, sadly. Mine was solid white
Hi, stranger! I hope this helps you out.
I found a website of cookie related memorabilia - the page links to 1997, which was apparently horse-themed, so that might be your year. There are photos on that site of a collection of plushes, including a white one.
There's also an online collection of all girl scout catalogues here. Some of them have plushes in them (for example, I found the blue pegasus in the 2000 catalogue). I don't have it in me to go through them all, but if you strike out here you could always try emailing whoever is doing the upkeep for these websites and see if you can get any more info.
I love doing research and I sold an insane amount of cookies in the 90s myself, so I gave hunting down your pegasus my best try! I hope any of this is useful to you!