Finally got the seats back and reinstalled back in the boat....
Used Silvertex graphite and reticulated foam. Foam was a bit expensive, but as the normal stuff holds water so much it was a no brainer to use the proper foam.
Just now to get the jockey seats done to match. The boat IMO looks more up to date, being now 13 years old...
Fuel lines replaced, sender gasket replaced and repaired, seastar steering added, good to go for another 13 years...