help searching for tires

I'm still young and don't know too much about trusted sellers and websites.
I'm looking to buy 33x12.5x20 mud tires. Looking for something under 210 per tire, e 10 ply. I mud and haul alot. I'm a fan of cooper/goodrich k's for my 07 chevy silverado ls. In a few months it's getting 2 more inches to its 4 inch level and painting the whole truck black from grill to bumpers and fender flares. I currently have 4 in spacers. Trying to make it look like a monster ☺ I prefer black but if it comes down to it, I can use/take chrome.
If anyone knows trusted sellers or site please direct me to them.
I live in central texas and can visit stores around this area