no rear wiper

I recently bought an '01 Rodeo Sport with a hard top, and didnt notice it at first, but there is no rear wiper or defrost.
On the dash, there arent the buttons to push either. There are placeholders there, but no actual buttons.
Id really like to put one in, I live in the NE, and it would be a tough winter without the defrost and wiper.

Any suggestions?

thanks

do you have a factory hard top?

If so You can purchase the buttons at an Isuzu dealer, St. Charles isuzu is a good one. Or hit up a salvage yard www.car-parts.com