Wanted to share a part source with the site. The plastic tracks that guide the Tambour door on the locker that was intended as a TV cabinet are no longer available from Catalina.  I was able to find the tracks are still made by Omega National Products, part number stamped on track is TS-21-RH or for opposite side -LH. I purchased a set through Wood Workers Hardware, their part number NPST21 BRN, cost about $11 for the pair, by far the least money I’ve ever spent on a boat part.  They can be reached at 1-800-383-0130 or website.
http://www.wwhardware.com/omega-national-spiral-track-system-brown-npst21-brn
As a side note Len at Catalina parts mentioned their wood shop still has some materials on hand for the roll up door.