Hello Bob, I know of nobody else selling such. Products, such as the replacement pads for the Mo-Fi, and Disc Doctor Brush pads will not be long enough to use on the Vacuum Wand, I've checked this, and as well, searched for other sources, other than Disc Doctor, to no avail.
I'm sure the velvet material can be gotten, but the problem is, nobody markets it, with the peel, and stick adhesive backing.
The only other souce i know of in the world, for replacement strips for the VPI, or other vacuum wands, is Yip in Hong Kong, the maker of the MintLP Best Arc Protractor.
His replacements must be glued onto the wand with a special glue.
But, maybe?, the only other possible source that comes to mind, is Nitty Gritty, as they sell replacements for thier own machines. Whether that material is suitable for the VPI, I imagine the folks at NG can tell you. Considerations of course, is whether thier replacement strips are long, and wide enough? Hope this helps. Mark