rotifers.

[gogo]

hello folks...i'm looking for a canadian source of s type or ss type rotifers.
i'm currently culturing L types, copepods and ciliates. nanno , tetra and dunaliella phytos.
i've got a breeding pair of stonogobiops nematodes that have let out two dozen clutches of larvae and can'[t get them passed six days. i really need to get some s types to advance.
if anyone out there has any or knows a good, reliable source, please let me know.
i've been pretty desperate lately and ordered from a canadian supplier that let me down. $110 for three bottles of green dead stuff. i can't afford to do that again.
thanks
martyn