Use this to hook to your plate chiller.
Take a look at the link below, pick out some stainless fittings also and make you a Stainless in-line Oxygenation Assembly. Hard plumb it to your chiller or not and/or add a dial thermometer.
I'll give you a deeper discount if you buy some stainless fittings along with the stone. Make it for less than the morebeer unit.