How can I purchase a replacement case for the Bird Site Analyzer SA-6000EX?

The SA-6000EX has been discontinued for a few years however, we do have cases for our old SA-1700EX, which is the same case, but it is yellow, not the dark gray.  

The part numbers are below:

7002A177 (Front)
7002A178 (Rear):
5A2442-2 (Push Nuts-14)