Hey, Phil from Kicker here-
Go ahead and call in. The guys in customer service are pretty good about taking care of grill requests. One thing you need to know is the exact model number of speaker you want the grill from.
There are 05KS650 models, and there are also 055KS650 and 08KS6500 models. You need to be precise, as there are differences. My gut says you will want the 055KS650 grill for your purposes, but make sure.
One other thing to check is if the RS grill and the KS grill are interchangeable. At the moment, I do not know for sure, so you might try swapping them while you are in the boat to make sure it works. There are some differences between KS and RS baskets that could affect fitment, (RS is cast aluminum, while KS is stamped steel). There might also be differences in the mounting system. I wish I could just go and look, but I am not going to be at the office today.
Good luck and let us know!
(Message edited by philwsailz on April 03, 2009)