Any HVAC or roughing pump should do. Over here anyways, they're available at some hardware stores, or equipment wholesalers.
I suppose the thing to watch out for with an Ali Special is, maybe not so much whether it works at all (but, if they send utter junk, that's certainly not beyond the realm of possibility), but if the seals, or fitment of the pump mechanism, or vacuum oil, are incorrect, it won't go to nearly as low pressure as desired.
A vacuum gauge might be a good idea, and, I don't think you need anything exotic to measure pressures in that range?
Tim