Black Hills Leather, (Little Bear - Now gone, IIRC), Galco, Bianchi.
Just about every company makes a holster for the venerable 29 / 629. I tend to like custom rigs, as I typically prefer a bit more 'style' in them: two-tone contrasting leathers, 'odd' leathers like stingray, elephant, python, shark, etc.
JMO, don't skimp when it comes to holsters and belts.