Protective Cases for the My Passport Pro series 2 & 4 TB HDD

I recently purchased both the 2TB & 4TB WD My Passport Pro HDD and like them very much. I travel frequently for business and wondering if WD plan to release a protective case for the new line. I’m worried that dust and dirt can get inside the unit through the fan or cooling holes in the bottom and cause it to malfunction. Given the cost of these units you’d think WD would have had this available when they released the units. Currently using a camera bag which is to big and have not been able to find something that fits properly.