If they don't respond than they don't want to sponsor you.
"If you were to assemble a United States of Playground you would need a place to locate a capital; a place where the landscape was created by Dr. Seuss with a backhoe. A place where it is possible to wake up in summertime and drive to winter. In short, you would need Utah."-Jonny Moseley
You can inquire on some of ski clubs near on your place. Or join in a ski clubs which you can ask on mountain resorts. So you can have the opportunity and if so you can be updated by sponsorship thing.