It has to be a really high demand item. Another company might sell a similar kit, but I don't know of one off-hand. It is a very high quality little rebuild kit and I'm glad they make the time, to take the time to put them together for sale to us at the price point they charge for them. It is a very good value.
After almost an additional week of waiting for my 2nd kit, I got just a little concerned when I hadn't received or heard anything so I shot them an e-mail to follow-up on the order. William got back with me the very next day to tell me they were awaiting receipt of ONE bearing to complete the kit. I received my last kit just this past Saturday. The bearings in this last kit came all bundled together and wrapped tightly in a clear plastic wrap. I didn't check the bearings closely, but I did note the cup on one had "Japan" on it. My first kit had the bearings in their individual boxes. They were all Koyo. I didn't see the gear paint and small brush in this kit... but again, I didn't unwrap it because I didn't want to contaminate the bearings.
If you are in need of rebuilding your diff soon, I can send you the one I have on hand and you can send your bearing rebuild kit back to me whenever you receive it. If you are squished for time, let me know. No big deal.