Plastic gas tanks for Blazers

I have to replace the gas tank in my 85 Blazer, and I don't really want to use my spare tank since it's probably just about as bad.

Anyways I'm wondering if anyone has found a decent plastic tank for these blazers.

What are the advantages of plastic, besides not rusting

and are they as tough as a steel tank

Thanks

plastic tank are resistant to corrosion, lighter, and just as strong. most newer vehicles are using plastic tanks.