Looking for a dust cover for your machinery? ........ Try searching in your local BARBECUE dealership. Many water-proofed, shaped and sized covers are usually available. They can also be cut and trimmed to the needed dimensions if needs be.
These covers could also be used as the source material in the creation of specific shapes if you, or your good partner, is handy with a sewing machine.
Cheers ...
Collbee (aus).