I use 'gears/tracks' I buy from ScrewFix, for mine, I'm a wheelchair user and specifically make units no more than 140cm high, for a living for other disabled consumers. I've included a link to stuff using a simple 'sliding doors' query. Here's the link:
apologies about the length of the URL, almost as long as the 140cm wardrobes I make!! ;-)
Regarding the roller shutter, Norm Abram made a simple one for a desk he built.
He 'rounded the edges' (by routering) of some (10-20mm wide x 18mm thick x length required) lengths of timber (must be rounded so as not to snag on the timber above and below when glued to canvas).
Cut to the size of the opening with overlap (8-15mm, both ends??). Rebated the desk front to 20mm (2mm over chosen thickness), makes a rebated inset for it's tracking, then simply glued his timber to a 'curtain' of canvas and seperated each of the individual struts of timber along the length of the canvas when dried, to create a flexible curtain like effect. He simply then fed it into routered rebate on desk front, before placing a cap atop to stop it from coming out the top end. I'm sure I could have explained this better, but, it's 2.15am! :-)
Best of luck with your projects.
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