Do you mean a double seat for the cab area or the rear seat for a crew cab van. If the first I might be ablento help
Double seat for cab Sarah. There appear to be different ones. I think I have a late one in mine and bought an early one for a late walkthrough conversion which won't fit. It wouldn't fit an early either but no doubt would fit a panel van.
The one we've got came out a 79 panel. I'll grab some pictures tomorrow and check with the boss he's happy to let it go.
The difference is the rear bottom strut that hooks into the hookey things. It needs to be straight, not dip down.
This was taken from a 1976 RHD has a tear highlighted in the photos also has a scuff on one end. Generally a good seat............