I've seen new tanks on eBay for $119 shipped. That video link I posted does show a decent way to modify the tank. I followed their lead and had great results. I had to purchase a nutsert tool (only about $15 from Harbor Freight) and we were extra cautious about making sure we had a good seal. - That's why we chose to make a cork gasket in conjunction with the Permatex sealant. Our pump runs cool and quiet and the tank setup looks stock.