Ace Seat Rail

[aex125]

AEX 125 came back from the upholsterers last week and over the weekend I realized it came back missing the lower outboard seat rail on the passenger side. They have scoured their shop and cannot find it so now I need to find a replacement. Does anyone have a cross reference for a replacement seat rail that might be used on a different make of car? The piece I need is the one that goes through the floor and is bolted down and goes against the one bolted on the seat. The other 3 pieces (inboard upper and lower, outboard upper) are still there so I only need the 1 piece.
   Thanks,
   Jay