This place is reasonable
https://www.woolly.clothing/pages/mens-boxers This company has exceptional products and good sales
https://www.ramblersway.com/mens/rambouillet-merino-wool/wool-jamb-boxer Unfortunately the moths thought they were delicious and picked these shorts over all the other wool I had. I treat them with Sawyers permethrine as soon as I get them now, this and a mix of diatonicious earth and boric acid keeps the moths at bay when the clothes are not sealed up for storage.
Just got some wool blend henlys from MPG Sport at a good price. Even though they are only 50% wool they perform well, I think the polyester they use is the wicking type.
Sierra trading post has first light sometimes but usually odd sizes. Even Walmart has Merino on line so look around. Me personally the concept of camouflage under wear is ludicrous and makes it easier not to spenf big $$$ on them.
Keep looking and if you don't care about the brand there are some good products and prices available.