Oh cab & chassis? I thought you meant Crew Cab. Then you can use most any cab & chassis F350 diff since maybe 1970 thru to '97.It looks like a single wheel axle. Like the price . Not sure but that may not fit my Cab and Chassis.
We’ll I spoke too soon. It looks like my SRW pickup axle is a lot easier to come by than your cab and chassis axle. I’m not sure where you are in Arkansas but I searched Little Rock and didn’t see any direct replacement axles for yours within 200 miles.Car-part.com is the place you want to look. They connect to all the junkyards so you just put in your truck details and it will show you all the junkyards that have a compatible axle in stock. I found dozens and dozens of axles within a few hours of me when I looked, with plenty in the $250-350 range.