Locally John at Border Parts.
OR
Robert at RWK Haus Supply......He's a vendor in one of my other clubs (NAXJA) and has great prices on quality products. He's in Yorba Linda but will ship. It's wort getting a quote.
I purchased my gears from him.
He carries: Motive, Nitro, Spicer / Dana and Yukon gears.
http://www.rwkhaussupply.com