There are no effective RC opioids and even if there were they are either novelties (not hardcore street opioids, dermorphin is definitely not one!) or rapidly fall under control/legal scrutiny (O-desmethyltramadol). There's a dermorphin thread (use the search function) but the general consensus is it's non-recreational.
Also, we don't discuss sourcing. But think to yourself, do you really think a substance related to opium alkaloids, invented many years ago, that's 50x as strong as morphine, would be readily obtainable on the internet?