Panasonics are extremely incompatible with each other's remotes. The only remote that will enable you to do that is the original one. You might try some remotes from the sx71/91/72/73 which all feature the same one. The sx76 has A-B repeat so there is no guarantee it will work. Sonys are much better in that respect.
hehe i hear ya on that one. i got a remote for another panasonic model (cheaply at least) and it doesnt work at all. i think curry's partmaster might have on tho