Here are some links to online sources for tambour door material & tracks.
The tracks can be found at: Outwater.com
The tambour itself can be found at: Rockler.com
The solid oak tambour is sold by the sheet, a "Full" sheet is 27''H x 50''W and costs $150-160 & a "Half" sheet is $75 or in kits.
Another source is: Tape-Ease
They have all types including Solid Wood, Wood Veneer, Vinyl, Metal & Mirrored, Paintable & Laminate PLUS all the tracks & pieces.
I haven't ordered Tambour from any of these folks (no need in a '64) but I did order stainless steel t-moulding from Tape-Ease for our countertops & they were terrific to work with...very communicative, items were well packaged and fast shipping.