Go buy a new one. If you find someone who is crazy enough to try for gods sake take it out of the car 1st.
I guess when I installed my bags, I didnt realize that when I aired out my exhaust flange was being pushed into my gas tank, well just got home, and smelt gas. Put the car in the air and I have a pin size hole in the tank. Sucks I just put $50 in gas in it about a half hour ago. I have tomorrow off, so if anything I can drop the tank if I have to, but is there a way to patch it from the outside?
If you want a repair instead of a replacement, I would use this stuff. Ive had good luck with it in the past. http://www.acehardware.com/product/i...03&cagpspn=pla
If hdpe is soluble in a heavy petroleum distillate such as pure acetone, you can make your own by dissolving hdpe filings in the distillate, it will bond and harden when exposed to air....I make my own abs and pvc putty this way.