Having a bit of a garage clear out, got a set of Flatlands stainless seat wedges

They have been painted blue which easily sands off, see pictures. They're stamped with TOP & OUTSIDE to help with fitting.

Welded in bolts and spacers which when fitted to mine went through the pans with good size washers to spread the load, easily cut off if not needed

They will need drilling for whatever seat runners you are using

Can't remember what they cost and can't find any for sale. Say £35 collected from near Leek North Staffs or if you can wait can take to a show