Some CRT televisions have a mode you can get into that will let you adjust the H/V size and position. The old small Philips TV I have sitting here lets me do that. Unfortunately that will require you to have a remote for the TV, and to be able to find the correct code to do so. Google can possibly help.
As for getting a different TV, a Sony PVM 2030 or 2530 are both really nice and can often be found for dirt cheap.