Luckily for modern technology, someone has uploaded them on YouTube...here are a few of my favorites:
Rock 'n' Rodent (1967)
I remember thinking this was a weird cartoon, but I really liked it for some reason. Jerry goes down in a cute mouse-size elevator to a beatnik-y mouse jazz club. The mice are too loud, waking a sleeping Tom, and fighting ensues.
Neapolitan Mouse (1954)
My favorite scene as a kid was the cheese rolling scene (near the end).
My favorite part is when Tom looks for Jerry in the cereal boxes (when cereals were touting their boxed prizes).
[Edit: Can't tell what language the last cartoon is in...odd].