I used Alamo in March for 3-day PH's and had no problem, but have since read that Alamo has restricted sales. I have never used this company, but this was in an email that I subsrcibe to.
Hopfully this company will work for you.
The Timeless Tip of the Week brought to you by TheMouseForLess.com and Billie:
AirTran Airways recently began a new WDW ticket transfer program, meaning that when you call 1-800-AIRTRAN to speak with a customer service specialist, they can transfer you to a preferred ticketing line and you can receive as much as $25 off per ticket. I called it recently to investigate, and found that they do actually offer the ever-elusive THREE-DAY Park Hopper and Park Hopper Plus. The Three-Day Park Hopper Plus for an adult came to a total of $170 including tax.
Good Luck
CBS