G is that way with clothes. Things just disappear mysteriously in the wash once they are too worn out. He might pitch a fit, but he moves on. When I do get him (or J) new clothes, I try to buy a bunch of the same thing.

EBay possibly?

I would try same colors, similar texture at first and gradually similar texture different colors. I hope this helps!

is it about the colors, or is it about the textures? when I only want to wear one particular jumper/outfit, my mum buys me another one of the exact same, but a different color, so that I feel like I am wearing the same thing, but it's actually a different outfit.
Hope this helps! :)

My daughter is the same way. It was woe hen she was 5-7 years old (K & 1st grade). I was surprised the teacher or school didn't say anything. To I told them the situation. My daughter has always wore (and still does) a jacket when going out even in 120 degree weather. When she was in person at school she would wear te jacket all day long. Teacher and recess aides would try to no avail to get her to take it off She once told me she doesnt want anyone to see her bare skin On her arms (nothing wrong with arms all normal) when I asked why she just said "Because".
Sorry, no help just letting you know you are not alone. My daughter is now 10 and she wears the same clothes all day and night; unless she spills a drink on shirt (She will change, don't think she likes the wet shirt touching her) but she will wear them for a week or two sometimes more. Lukily we don't go out much. Her pants have huge holes in them. She like to crawl around like a dog she drive me crazy whining like a dog.