you can find the steel dividers at any mustang part supplier, try mustangsunlimited.com but I'm sure there are many places you can find one.
My brother carpeted his vette with marine carpeting, which is good for whether and moisture plus I think it's supposed to stand up to some abuse. The hardest part is going to be forming the carpet along the curves. I don't know how you're gonna accomplish that, especially on the wheel wells. If it were me, I wouldn't bother because it's going to be a mess one day if you decide you want to pull it all out. If you do decide to do it, go to a carpeting or apholstery shop and they can get you the fabric and adhesive you need.
One other thing I would do is pull offf all of the body sealer that way you'll get nice clean edges.
My brother carpeted his vette with marine carpeting, which is good for whether and moisture plus I think it's supposed to stand up to some abuse. The hardest part is going to be forming the carpet along the curves. I don't know how you're gonna accomplish that, especially on the wheel wells. If it were me, I wouldn't bother because it's going to be a mess one day if you decide you want to pull it all out. If you do decide to do it, go to a carpeting or apholstery shop and they can get you the fabric and adhesive you need.
One other thing I would do is pull offf all of the body sealer that way you'll get nice clean edges.