I just found a used RB top on cregslist but i have an EB ford.
Is the canvas intact? Depending on the price I would snag that.....Used SMB penthouse tops are rarer than hen's teeth.....carefully measure the hole in the donor van when the top is removed.
I paid $2K for a used SMB RB top from CL...had to remove myself.
If you decide not to pursue the top please post it here so others can.