I'm getting towards the bottom of my collection of Midas spares now, I can actually move in the cellar....good old Ebay!
One of the things I have left is the original Midas seats (Huntmaster?).
They are in black vinyl with red (faded) piping. Covers and frames are good but the foam needs replacing in the seats and backs, despite which they were still very comfortable.
Too good for the skip, so free to anyone who can use them - maybe use the foam from your old seats in these?
They will need collection from Bristol.