We had the exact same question the other day.

When we called they told us over the phone to:
1) go to
www.alamo.com
2) click on Programs
3) click on Corporate
4) click on Quick Silver
5) click on Enroll now and fill everything out.
We received our number 3 days after we enrolled. There is a 3 day wait time to get a number.
Hope this helps!
We used Costco.com and got a great rate with free additional driver and additional $$ off.
Good Luck

7 days and counting for us
