Hi Kimberly,
I honestly didn't have any more luck than you did in finding new replacement parts; the closest I came was a listing on eBay for one that is new but it's really selling the accessory door with the wheel on it, so it's only one. There are a few used ones you can get there, the search I used was "Shark SV1106 (wheel, wheels)".
[link|https://www.ebay.com/itm/266407326530|Shark SV1106N SV1110 SV1100 SV1112 BRUSHROLL ACCESS DOOR SMALL WHEEL OPEN BOX|new_window=true]
However, those wheels look an awful lot like the ones I bought for my Navigator Lift-Away. If you have a set of calipers or are really good with a ruler, measure yours and compare them against this picture that came from the listing I bought from.
[image|3164995]
I saw at least one post where someone mentioned that the wheels themselves worked fine but the post that came with them was the wrong size so they just used their own original ones. Here's the listing.
[link|https://www.amazon.com/gp/product/B08B65S8QQ|Amazon.com: Front Wheels for Shark Vacuum Cleaner, Replacement Wheels Compatible for Navigator Rotator Series NV22, NV42, NV352,NV360,NV350, NV351,NV355, NV356e, NV370, NV502,N472, NV650w, UV440, nv502, nv752 : Home & Kitchen|new_window=true]
That seems about the best I can come up with, hopefully it'll help.