Hey Raskol!
I think I saw some available in one of the "Approved RC Vendors" here on DBG. I may be mistaken though, but it's worth a look around.
I have a little experience with Metonitazene, which is a benzimidazole as well. All I can say is, tread lightly, haha. The high was good, had a decent duration and was very analgesic. Moderate euphoria. I insufflated most of my doses and the come-on was strong and quick... very, very nice rush! Nodding was present definitely. Some mild nausea I remember was experienced from time to time at solid doses... but otherwise, it was a clean high. I dont get anymore of it due to it being Schedule 1 in the states now because of the Analogues Act.
Reason I say tread lightly is I found it very addictive and would redose to keep it going at its peak. This one almost had me by the balls.
When I came off of it... wow, super bad withdrawals man... worse than any other I experienced. You felt like a truck hit you, you had the Flu, and you had were food poisoned all at once... the cravings were unreal, seriously.
Hope some of this info helps man!