Pull one of the good wheels and look on the backside to see if there's a part number or something.
Another place to look is the serial number on the axle. With the serial number, call lci1.com (Lippert) at 574-537-8900 and ask them to look up the B.O.M. (bill of materials) sheet. This lists each and every part number associated with your axle/trailer. They should be able to tell you what wheels were applied to the axles during the build.
Hope this helps.
2017 Forest River Surveyor 247BHDS...
...Tugged by a 2016 F250 XLT FX4 SuperCrew, Shortbed 6.2L, 4wd, 3.73...
...Joined with a Husky Centerline TS 800-1200lbs WDH