Help with the substrate

[Merita]

Hello everyone:
I would like someone to guide me where to buy a decent substrate for cattleyas. I have been cleaning, washing and boiling the one they sell in the market here for years, but it has already reached a limit, what it brings is mulch with long wood chips, old, compacted, wet and dirty, you can only see a few pieces of old and used bark. I show them to you, I have already thrown two bags in the trash.