You might want to take a look at the chunky peat offered by Roberts Flower Supply. It is peat that has not been milled into the powdery consistency of regular peat. Chunks are irregular, ranging from 1/4" to 2".
When I lived in Europe, we could get chunky peat that was graded. I used 1/2" for Paphs & Phals (mixed w bark, charcoal & LECA), and 1" in a similar mix for Cymbidiums.