The regular warranty is 5 years I think you have to pay an extra fee to get 10yrs - but I just had one do the same thing - inside seal was leaking - you can get all the parts you need from UFP (think they are owned by decker or something like that) just do a search for UFP. Its not difficult to do it yourself when you get the parts - I went ahead and just go new vaults since I'm coming up on the 5 years anyway also you can service the actual hub but a whole new one is like $15 so much easier - took about an hour to pull the hub replace the seal and reassemble.
If you decide to do it yourself you have to use the "special" vault hub grease and you'll need something to pound the vault thing back into the hub - UFP sells a tool to do it but you can go to Lowes in the plumbing section and there's a fitting that works perfectly - you can't use a piece of wood like a regular hub because when you put it on that little plastic end sticks out past the metal edge - might crack it.
McGills in Lewisville has seals. Most of the time if seal starts leaking it happens when you have pulled boat for a long distance or at high speed and then back it in the water almost immediately when you get to the ramp. Happened to me when I was running late and pulled boat 75 to 80 mph to lake in OKLAHOMA from plano and mine developed a leak.