Send them to me! LOL!
those "roll closures" are called "tambour" doors, and they are known to be troublesome. a PO removed them from my '73...I would like to put them back.
The replacement that the PO chose is functional and easy to install, but I'm not fond of it. It would be 1000% better just by choosing a more appropriate colored material. but anyway, you can buy alluminum track at Home depot et. al, and just pop-rivet it to the bottom and top of the cabinets, then put in these pieces of fake paneling to make sliding doors.
these pics weren't taken to show the tracks, but you can get a pretty good idea if you look close in some of the shots.
seriously, I'd be happy to buy your tambour parts if you have no interest in restoring them. if the wood pieces aren't snapped in half or anything...just "sticky doors", or if they've become detached from the canvas backing, they can be fixed. I would need the scrolls and trim pieces, as well. you wouldn't want to try to attach a hinge to those thin pieces of formica, anyway. they wouldn't support it. The sliding door solution that I have covers over that area, so you wouldn't need them, if you go with this sort of solution.
pm me or email if you're interested: cac4 "at" comcast.net (anti-spam measure: just put an "@" where you think it should go