Does anyone knows where to find good clothes?

Ok so here the thing. I recently bought a pair of those cowboy boots but black and they gave me the inspo for like a goth/dark cowboy outfit. 

I had in mind like a pair of  black flared jeans (can be any material like denim or leather-like as long as it's flared), one of those gilet and the cool jacket on which i might add some studs etc. on it. 

The problem is that i can't seem to find a good place online where i can find those things. I also tried to look on vinted but it was a waste of time.... 

someone please help :')