Mr. Kevin, I started when I was 8, now I'm 57 pushing 58 this year. You have to be really good to be able to get endorsements.
Send some DVD copies of your talent to all the drum companies. Even try the promoters of NAMM.
I bought a Gretsch
custom kit. I was lucky enough to get it before it got to the store, but I still had to buy it through the store (George's Drum Shop in Ohio).
George might be able to get you some endorsement.
Email to gerogesdrumshop.com
Some times they have drum competitions and select winners.