Not sure if it will fit but a supplier here in Canada has the dual line listed to fit 67-69.They seem to be pretty knowledgeable, so it is possible the 69' you are looking at MAY work. http://www.early-birds.com/part_223_230_238-29092.html
David
http://FirstGenFirebird.org/show/closeup.mv?CarID=571 If i don't get this car back on the road soon i'm gonna go postal! On a quest for FGF knowledge 1968 Pontiac Firebird Convertible 1969 Oldsmobile Cutlass "S" Convertible *Sold*