top switch bit the bullet

Amperage is the key here, and I think you want at least a 20 amp rated switch. OR, you could put relays back by the top motor, run bigger wires for the motor and use the existing wires to trigger the relays. Then you could use a smaller rated switch in the dash and you would have a bigger selection of appearances of switches.

BC
Relay's, that's what I'm doing for mine since I'm moving the location to the center console to match with the power window switches. Or you can get a new universal switch here fore around 36 bucks. (I'm going for the matching switches for my power window setup.)
it's a 50 amp switch
http://store.convertibleparts.com/unvrswi.html