I am aware that there are sprays and such you can use, however I could find no other products out there addressing this issue.
With some paint, glue, pipe cleaners and cheap fabric, I have devised some cheap,simple and easy to make blind covers.
Ever since I have made these "prototypes", my cats have not bothered the blinds since.
All you is choose your fabric. Paint the pipe cleaners to match. Glue it all together.
Attaching them is easy as you just place them where you want them and bend the pipe cleaners around the wood slats.