These look interesting. I've had a search for more info, and I am not too sure on the weight, or if there are variations in spec, as there seem to be variations in the spec depending on where you look, from between 1.5 - 4kg. I've ordered and received various things from Russia without any issues, maybe wait and see if any UK sellers appear with this one though.
https://www.ebay.com/itm/RUSSIAN-MO...IK-Original-NEW-/254109249678?redirect=mobile
https://www.ebay.com/itm/RUSSIAN-MO...IK-Original-NEW-/254109249678?redirect=mobile