An original tack strip is going to be hard to find. I assume your 3W is going to be street rod. I would go with Juliano's Top kit. Try www.julianos.com Good luck, Pat
The repo shops sell extruded aluminum strips. They are impossible to bend. I think they can be bent using a jig. It would be a cut radius with sides that extend up the width of the strip. Clamp one end in place and try bending. I would think some heat would help. It may be possible. I have not tried it.