I use reel seats from several different manufacturers depending on the look the customer and I are looking for.  Struble, Rec, American Tackle, and Batson are the most prominent ones.  Here is a sampling of a few of those.  I also turn out a few of the wood inserts on my rods as well.  Cocobolo, Zebra Wood, and Amboyna are my favorites. 
Down-locking hardware with a maple insert.
Up-locking hardware with an insert.
Up-locking reel seet with built in fighting butt.
All metal window style reel seat with a fighting butt.
Up-locking style window seat with a wood insert.
All Aluminum seat from Struble.
The Reel Seats
 
K Kustom Rods