Dallas Golf, Global Golf, and 3Balls. Titleist now has a new partnership with a reseller. If you go through the direct order site you should get the name. The epic company that also has a used club site does offer other brands. LH might be a stretch but you might find a Titleist there.
I have reservations about eBay. Garage based resellers don’t have the bandwidth to recognize a forgery when they see one and if anything goes wrong, it is a hassle to resolve. The aforementioned resellers have their own websites as well as links from eBay. As a LH golfer I used to search these sites - until eBay wore me down. So I buy fewer but new clubs now.