Unfortunately Titleist is not a retailer and does not sell shafts. Team Titleist is a forum for Titleist loyalists who share ideas, information and fellowship. Welcome to our site. One suggestion is to go online. They are available thru various sources at different prices. Me, I would first check with a local Titleist account repair shop and have it done professionally. They might have one in stock. Have you checked there?

Sorry to hear about your 6 iron. There are many, many golf shops that do replacement shafts and yours is a common one so they should have no problem matching it. Find a shop near you and in the future, try just throwing your driver head cover. I find them to be much more durable. Cheers.

Your best bet is to look on eBay or order a new one from GolfWorks, or Amazon if they have it. A 6i shaft should typically measure at 37.5” playing length.

One other possibility is buying a used 6i with the same shaft on eBay or wherever, disassembling and using that shaft. It’s possible that’s cheaper , but for reference a brand new shaft will be about $30

Many online suppliers have them. Be sure it's a 355 taper tip and specify the 6 iron to get the right one. And make sure you have someone who knows what they are doing fix it for you. Sometimes there are small weight inserts in them, depending on the build specs.