Just thought I'd let you guys know what happened.

They quoted me 1500 to fix the leak and rear washer, and they said that they found fluid leaking in the back of the car from a pipe. They pulled up the carpet and used a wet vac to dry it up (now there is no slight musty smell like there was before). I told them to simply disconnect the pump from the tank to disable the rear windshield wiper and stop the leak that way. So they unplugged the rear washer pump behind the tank for free and now I have a non-leaking, fully working windshield washer tank with the front washer still working