I just did a google search for "96 inch long vertical blind panels" and got a lot of hits, including blindsanddrapery.com, which seems to have 96 in. panels.
96 in (as opposed to 95) is a standard drapery length.
You can try all the places that came up in the google search and, I don't know if this was listed, but JC Penney CATALOG (jcp.com; NOT THE STORE) has made to measure window coverings of all kinds, including verticals.
If you decide to try painting them, be sure to use paint that is suitable for the panel material, eg, fabric paint for fabric, plastic paint for vinyl, etc. If you can't find them, go to a good size craft store or search online.