You know, it seems like I got something like that from my veterinarian when I first brought my younger cat in, as a kitten - they had a whole welcome kit from Hill's Science Diet - a sample of kitten food, some information about kitten behavior, and a veterinary history that you could fill in with dates of vaccines and operations, etc. So, ask your veterinarian if they have such a thing.
Me, I've never been good about filling those things out. But I have noticed that the over the last ten years or so, that receipts from veterinary offices tend to be very detailed, including what procedures were done, medications given and the dosing instructions. So I have been keeping those all in a file together.
Also, when I moved, and had to find a new vet, the old one did not mind faxing the medical histories of my cats to the new vet. So if you can remember the name of your veterinary clinics or keep their contact information, you can get the info you need.