Help setting up 70g, center overflow.

[JCSReefing]

I just recently scored a 70g center overflow star fire oceanic tank. It didn't come with bulk heads or return nozzles or plumbing. Need help with finding bulkheads and the return nozzle things. The drilled hole is 1 3/4 is what I measured. There are 2 cut outs in the overflow, for I guess putting the return nozzle on either side? Does anyone know where I can find and what I'm looking for to get this thing underway?