Located my leak under the car near spare tire (BTW, check your spare mine was completely flat...). The line is rotted away and the leak is getting worst.

I called the dealer for a ball park estimate on how much to replace the lines from the firewall back to the rear heater box (next to rear pass. tire) and they quoted me a price of $700 for parts and $500 for labor.

I don't have $1k+ at this time so I am wondering...

...has anyone had this problem and what was the outcome
...anyone try disconnecting and adding a loop to eliminate the rear heat for quick fix
...any other options to get me by for the time being

 

It is easily bypassed under the hood where the 2 hoses going into the firewall are keepers to keep the front heater. You can plug or bypass the ones headed to the back heater.