Do you have any particular size, handle material, steel, or price in mind? Is it for use as a camp knife, part of some kind of reenactment costume? For actual use, or as an investment to put back and wait for the price to increase?
Without any more details than you have given:
Randal Alamo Bowie
Ontario SP-10
Cold Steel Trailmaster
Puma Bowie
Marine Combat Utility (Kabar)
Cooper Iron Mistress
Cold Steel 12" Bowie Machete
Case Bowie
Western Bowie
Winchester Bowie
Gil Hibben Rambo 3
Rough Rider Bowie
Start with those. I'm sure that one or the other will fill the bill for you.
(Sorry, I'm high on pain medication right now. No sarcasam was intended)