I opted to use an old Cooler Master CPU fan from a Windows Vista eMachine that I had in my home. Went from cooling a AMD Athlon X2 to a AMD Ryzen 7700X.
Having looked up the model number when building my PC, it's apparently a model that wasn't meant to be sold individually, or at least, I couldn't find any places that sell or sold that specific model previously, beyond a few old eBay listings.
May not be the best practice to re-use old CPU fans like that, but monitoring the temps when running higher-end games, it seems to be doing the job just fine!