charlyB...
there's a native materials store just before the bianca bridge that has bambu blinds; i'm sure you've pass it. google maps shows it just past Gradient colors printing services.
Gradient colors printing services https://goo.gl/maps/Cu5KMFMBDXXBi8DG7
bambu place https://tinyurl.com/2htwat5g
i think u can order custom sizes there.