Gas tank help 01 XL 2500

[SKELLY4x4]

So, my forward gas tank, which happens to be plastic decided to start leaking. I'm not sure how that could happen suddenly at 60K miles and right after I just serviced it with some love. Anyways, a replacement is "not readily available" from GM. I'm looking for a used one in San Diego and none of the junkyards have one either. Am I the only person in the world that's had this issue? I've got 3 kids and my wife is driving the kids around in my 89 extra cab dually which right now doesn't have running lights and I'm stuck in Alaska on business so I can't troubleshoot the dually. I have a few options. 1. Have a custom tank built. 2. Rent her a car while the dually is in the shop. 3. Find a used gas tank and have a shop put it in. I want #3 mostly. Anybody happen to have one laying around near San Diego?