where did you buy wheels/tires

I can't help you with the wheel part. Perhaps someone will chime in with the website to order them. I went with LTs after reading much discussion here. Many have had discount /chain tire stores refuse to put LTs on an RV (Specifically a tire type no on the placard). I did not have that experience here with a regional chain. I took my wheels off the 5er myself and took them in to have the tires mounted as there was no space to pull the trailer in to the lot. They knew they were for a trailer but mounted & balanced them anyway. My advice would be to call ahead and ask.