That place is www.crcrc.com
and they are still racing in Columbus. Sundays are electric while Saturdays are nitro indoors. Then you have www.planetraceway.com
in Indianapolis, IN....Saturday electric, Sunday nitro indoors. Those are the "closest" tracks to Cincinnati and a 1.5+ hour drive each way.
Hot Bodies, HPI, Novak Electronics, JR Propo, Lunsford, Skipgear.com, Planet R/C, Vinyl Graphics Unlimited, JConcepts, B-Mods Racing, CRCRC, King's R/C Raceway, Avid R/C, GMK Supply, & Pacific Coast Hobbies.