Wow, good guesses by everyone, and I bet Home Depot noticed an increase in customer traffic this weekend as everyone attempted to find out what the heck the WDGRPR9"RLCG was.
I'm very glad that I did not include the UPC# as part of the clue, as I think that would have made it much easier.
Honestly I thought that I was probably going to have to buy everyone a 9" roller cover, as that answer seemed right on.
Unfortunately we were all close, but all wrong, and remember, "close" only matters in slow dancing and hand grenades.
The answer was: 9 In. 5 Wire Frame Paint Roller Handle.
Thanks everyone for your guesses! That was fun!