Spinlocks are what the things are called but ...
The humps are the complicating factor.
The spinlocks are 2 little parts that mount in sockets behind the seats and into which a shaft fits when the hardtop is lowered. Vastly overpriced (isn't everything Porsche). Sometimes available from used sources.
A recent hardtop went on eBay for $610 in pretty good shape. Normally, they go for $1200-1400 in the winter. Nobody want to ship one.
A strategy I've seen work is to see if someone selling an older car on eBay with a hardtop would like to sell the hardtop separately so as to lower the price of the car.
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