There is some conflicting information on the web. Schneider's Saddlery is the main retailer, but it seems at one time as if Circle Y had bought the Billy Royal line and it could be a division of Circle Y.
Billy Royal is the maker of their namesake saddles. They had various series and lines of saddles all made by them.
Billy Cook Harness & Saddle Manufacturing Inc - Sulphur, Oklahoma ...
Blazing Saddles starred Clevon Little, Gene Wilder, and Harvey Korman. Billy Crystal was not in the cast.
A person who makes saddles would be called a Saddler.
Howrse: English
saddlers
Saddler
Makes saddles
Billy Joe Royal was born on April 3, 1942.
Billy Joe Royal was born on April 3, 1942.
Fred
The song was first sung by Billy Joe Royal. If you wish to see the YouTube presentation of Billy singing this song, see the Related Link.
Need isn't such a great word for this. But saddles makes riding more comfortable for both rider and horse.