Go the "maintenance" section. There was a recent thread about cup holders and I posted a couple of photos of some SeaSucker ones that I bought at the boat show for my 1900SR3. Work great, mount almost anywhere but kinda pricey.
Same admiral since 1973
New Boat 8/13/11: Chaparral 206SSI with 5.0 VP GXI SX
Prior Boat: 2008 Maxum 1900SR3, 4.3L V6 190HP, Alpha 1 (great boat)
2010 Ford 150 XLT Super Crew 5.4L V-8, tow package
2008 Infiniti G-35