I will be having a run of 1980-1982 RT4 fuel cells made in the near future. Please note, the only difference between these and the later cars is the location of the fuel filler and they do not use a metal filler plate. These have the fuel filler in the right rear corner of the fuel cell top. Later cars have a central filler cap location.
Please contact fattogatto@msn.com if you are interested in getting one. No idea of the price yet as Eagle Fuel Cells (who made my last run) refuses to do any custom work and won't let me have the patterns. So, I have to go to Harmon cells in CA and start the process all over. I would guess about $1500 a cell, but it would be cheaper depending on the number ordered.