What liquors and/or liqueurs can you combine to get a close pumpkin spice flavor, without adding pumpkin puree?

I swear I saw a post or an article a few years back that perfectly described how to make a mix or cocktail or shot that tastes just like a pumpkin liqueur would taste like, but I can’t find it.

It seems basic enough, with flavors like cinnamon and vanilla, and clear liquors like vodka. The liquor stores near me don’t have much in the line of pumpkin spice liqueurs… I’ve been particularly looking for Bols brand, which I’ve had before, and Captain Morgan also had one like it (that came in a pumpkin shaped bottle).

Every article about making your own starts with adding pumpkin puree, but I’m 100% sure the article/recipe I saw did NOT include puree, and that’s not really the ingredient I’m looking for anyway (I want just a shot, or something you could add Baileys to to make it creamy if you want).

Has anyone had any luck striking the perfect combination mixing a few liquors/liqueurs (vodka, Baileys, caramel or vanilla vodka, Fireball or Hot Shots, Butter Shots, Amaretto, etc.) to get a homemade pumpkin flavored liqueur?