Lubriplate 105 is an engine assembly lube, not a grease or a gear lube. It turns to a liquid at a fairly low temp. Not good for gears. You also don't need it for an ATV engine. I don't even know which ATV you are working on but most use roller bearings. You don't need grease for those. So glad I spent so much time explaining what use, and you didn't listen.
Yeah, never order seals from CCC even if they are available. Too expensive. I'll save you some headache figuring this out too: same is true with bearings. I don't know if you got the number right or not.... that's your issue, but I wouldn't buy the cheapest thing I can find off Amazon. You want to do it over when your el-cheapo seals leak? Turning wrenches on your own stuff is fine. Cheap stuff is out there, and your free to use it. There's a reason it was only $3.50 and comes with free shipping. I prefer certain "name brand" parts when I work on my equipment.... but I've spent a year or two doing it for a living....