I don't know if you'll be able to source JUST a snake-head inlet, Yaser. It stands to common sense that the snake-head would be pretty much useless without the snorkel...so if you DO find one in Shuba...I bet you could get it real cheap.
As a corollary, though...a brand new Chinese snorkel comes in the PKR 17K range. Just lift the stuff you need off it (intake pipes, connectors, snake-head, seals etc)...and use the rest for shooting practice!