Looking to re upholster two period Recaro buckets, one a fixed "Rallye" and one the adjustable type with the external knods on either side linking the two halves of the shell. Given they are original seats I want to do them correctly - were they only ever supplied with vinyl sides and cord centres (as they currently are) or were they available in leather/cord, all leather etc..as you find with the normal Recaro sports seats of the period.
Any help appreciated.

Tim