Doctor JD here is the number for smp 423-337-3466 I talked to them about my axle last year , and they were very helpful and willing to build one but I had to have the boat off the trailer and at the time I didnt have anyway to do that. So if Jim cant help you I bet they can still tell you what you need or they may still have it in stock as left overs. Sorry I cant for the life of me remeber who I talked to though