Just in case anyone else is interested.... Mack DOES make the stamped steel bed flooring. $350 for it, which I think is reasonable. The problem, however, is it requires freight shipping....around $300 to NW GA. Also, there is a $125 crate fee added, so a total of around $775(Whew!!!) to me. In contrast, Mack's oak wood/stainless strip bed kit is $390 + UPS shipping(around $100 to NW GA).
Might be worth going to pickup the steel flooring if I go with it. It's around 8.5 hours 1 way. I have some things to think about I guess.