I'm confused. You say here that you are a size 30 waist but you said in your OP that size 30 doesn't fit you. So either you are not a size 30 or maybe you are saying that different brands of men's pants fit you different? That has never really been my experience with men's pants. The waist size is usually pretty consistent. If size 30 is too big for you (even after shrinking in the wash, I presume) I would look online because in my experience it's rare for most clothing stores to stock anything below size 30. You must be quite thin. If you don't already you should look into wearing a belt.
Looks like Amazon stocks Levis as small as size 28x32.
Barring that, look at Boys/Junior's sized clothes.
Sorry just to clarify, when I saw raw denim, I mean denim that’s not predistressed or prefaded - raw denim and predistressed denim are mutually exclusive. I think you’re talking about selvedge denim which is another topic altogether. I think I get your point though and I agree, Levi’s carries sub $50 raw denim if you wanted to dabble in the hobby: https://www.amazon.com/Levis-Mens-Original-Stonewash-34x32/dp/B0018OOVPC/ref=sr_1_5?ie=UTF8&qid=1526737129&sr=8-5&keywords=Levi’s+501&dpID=41T%252BHZfQPsL&preST=_SX342_QL70_&dpSrc=srch