Anyone know where I can get a remote that is compatible with the DVX or other panasonic dv cameras?

The remote that comes with the dvx100a is the same remote that comes with single chip consumer panasonic cameras. You should be able to get one or have one ordered at any electronic store.

Try http://www.varizoom.com/ under the camera and lens controls link. There are two zoom controllers available, but since there is no Lanc on the DVX100 or 100A camera, the zoom is all they control.