I have had 6 knives from them. Currently have 4. Had a mix up with an order one time, and it took a few days for them to get back to me and they sent me a free shirt because of the mix up. So their customer service/relations is good, I think they are just busy. And yes, they absolutely do custom work, you can see custom stuff on his feed all the time.
Anyway, super solid, super sharp. You can look around the internet, see some reviews, I haven't seen anything negative. And he is an actual ex SEAL so I would guess he makes things that will get the job done.
They put new knives up most weekdays around 7 PM Eastern, so if you monitor the site you'll eventually find something. Or you can go the custom route.