Reliable Sheet metal?

Well, the 73' duster I just picked up last week needs more sheet metal than originally anticipated. I took off the kick plates on the rockers to clean them up, so I figured I would peek under the rubber floor mat...I saw to the right to the ground:banghead:. So I guess that is just something else I have to replace, along with the lower rear quarter (one side in front one in the back), a rocker panel, a very small hole in the trunk, a trunk lock area and anything that I might find along the way :(. So I need a place that sells good, nice grade sheet metal. My dad is not very happy with some products that he had bought from ABS in the 80's, he said they rotted within 5 years. Can anyone tell me how their products are now? Anyone want to post experiences with sheet metal places...the Paddock, Sherman, Year One, Goodmark? This could help not only me but anyone else looking for good sheet metal.