sylus & repairs for 1967 Magnavox Cabinet Stereo

I'm not an experienced collector, yet I have my grandfather's 1967 Magnavox Cabinet am/fm radio and turn table. I have been searching for a new stylus for the record player. Does anyone have any links or hints about how to track down the appropriate size and type? Also, I live in the Washington, DC (US) area, and I'd like to find somebody who can service the radio. With a new stylus, it will play fine, but I have to increase the speed in order to get it to player regular-sized records. It's a sentimental piece and I'd love to have it in working order soon. Thanks~asibley