The catalog that I found that tank box in was Carolina Classics. It is dated Jan 99 so it may very well be discontinued - I do not know. But here is what the ad says:

1964-72 styleside bed gas tank relocator kit, use your original tank and relocate it in the front of you styleside bed, a complete bolt-in unit, only takes up 8" of bed space at the front, available ONLY from Carolina Classics.

It listed in the catalog for $360.00. The numbers for Carolina Classics are 1-919-682-4211 and 1-800-598-4211.

Chris Seay
Bealeton, VA