I've also been looking for alternatives to welding my punctured panel truck fuel tank. The cheapest options seem to be in under-deck marine fuel cells ($150 and up). There are drawbacks: This is not a huge savings over having the tank welded, the cheaper versions are limited capacity (and may not meet DOT safety specs), and there will be plumbing issues with any non-OEM tank. A quick search on the interwebz gave me
this $235 plastic unit alongside
this $220 steel tank. That seems to be competitive pricing, even JC Whitney's plastic under-floor tanks are $210 and up. So the short answer is No, no new fuel tanks at the $150 level.
