are you missing the entire wiper assembly or just have some worn down fingers/contacts?

I suppose in either case the answer is the same - barring finding one from another carnival queen, ya make one from parts games by swiping the closest one you can find then scrounge for replacement fingers that are punched correctly to line up on the rivets you need.

if you have a pic of an existing one with bad contacts, please post. If you need one from scratch, I'll take a look at what parts game I have access to at the moment.