New owner, need help getting tires/wheels

So I picked up a 98′ Grizzly 600 about a week ago, it needs new skins. This is my first ATV, pretty excited about it.

BUT…. the tire sizing is making my head spin a bit.

So currently I have at25x8-12’s on the front, and at25x10-10’s on the rear. (I think they are the stock steel rims)

Well I’d like to upgrade the rims/tires.. Did a little looking around and it seemed like ITP SS312’s were the "cool" thing to do, (And they look good)

So I’m looking at getting the K299 Bearclaw 26×11-12’s for the rear, and K299 Bearclaw 26×9-12’s for the front..

Here is the question, I’m having a hard time finding the rims/tires that match/fit together, while making sure they have the 4/110 bolt pattern.

AND I live up here in Alaska, which makes sites I order from limited due to shipping (one site wanted $130 PER TIRE for shipping) D:

Thanks!