[MPerry]

I am broke down near Orlando needing a water pump for my 903. Roadside assistance keep wanting to tow me to truck shops that seem unfamiliar and unqualified for the job. Does anyone know a shop in the area they would recommend? I think i would be better off being towed home to Gainesville, about 100 miles vs the 19 miles to a random truck shop.

This is part of the reason I have AAA, hoping that I can get them to tow me where I want to go instead of some random shop. And generally I want to get to somewhere where I can fix it myself. Thankfully I have not had to be towed yet, knock on wood. 
So you are going to probably run into several issues, no places are going to be open until possibly monday or tuesday, depending if they are closed for labor day. Then there is going to be the part, not sure how many folks are going to stock the water pump for a VT903. I wish I knew of a place to send you but do not have a clue about places in Orlando. I am sure there is a Cummins dealer, but if its like the one in Tampa, you would be waiting for quite a while to get it fixed while you wait for your turn in line. 
How bad is the pump? Is it pouring out? Any way to patch it up enough possibly to get you by to get it home? Just some thoughts. I am not real familiar with that engine, but appears its a belt driven water pump. 
You could get on Cummins website and see if they even have the part by entering your engine serial number. Anyone can get on and check. If you do not have access you can send your ESN to me and I can take a look and see what comes up.

 Thank you, I appreciate the comments. I am definitely running into places being closed for the holiday and it looks best chances are going to be Tuesday. My roadside says that if the guy answering the phone says he can do the job, they are qualified, but i disagree. My first call was to Cummins (Ocala and then Orlando) and was met with a service writer who never heard of a 903, so that didnt go very well. I did try Cummins website, but couldnt find any parts, which could just mean they dont have online support for this model. (ESN 11058025)

I think the best route for me would be to get the rig back home and repair it myself. It doesnt look like a terrible job. Tow quotes have been very high. (2875 to 3500) I have considered driving it home, the pump is a slow drip sitting cold, but gets much larger hot and under pressure. I dont know a lot about diesels and worry about what high heat cycles might do.