MGB: 69 seta back cushion

Given the longer commute, I was looking at rfe-stuffing my driver's seat. I noticed Moss, the 69 seat back cushion is way more expensive that all of the other years. With VB its the same. What gives? The bottoms are the same. I know the 69 seats are unique, but such a difference, oy vey!

I think I meant the seat bottoms

There are so few of them out there that the cost of tooling has to be spread across expected sales, which isn't many.