Need help buying crossover system
 

My current crossover does not have thermostat or bypass so I'm trying to find one that will work with my inlet hose and exhaust. My water runs through a oil cooler and power steering cooler and exits the power steering cooler to front of block. The hose attaches to crossover with 12an fitting. My exhaust are emi thunder and the hoses coming from thermostat housing to exhaust have 10an fittings. I also have a hose from water pressure gauge and I believe it's a 3 or 4 an. The crossover that seems to be the simplest is sold by Hardin marine but the inlet is 1-1/4 barb inlet and the exhaust hoses are 1" barb. There's no where to put pressure gauge. Anyone have any idea how to make this work. From what i can tell On the inlet side I would need a hose with 12an female on one end and 1-1/4 hose on the other and exhaust will need 1" hose on thermostat housing and 10 an female going to exhaust or a fitting that screws into exhaust with 1" barb. It's 620-300100 on Hardin marine website. Ideally a thermostat housing like this one with an fittings and a crossover with an inlet fitting would work best but I'm not finding anything like that.