Hi Ross,really like the look of that! Could you braze your fittings on to the four inlet/outlets,then get a pair of hoses made up at Hydrasun or Pirtek?(other hose manufacturers are available

)
Pirtek will be able to do a rubber braided, or an outer braided/Goodrich type.
I did kinda the same thing in the early eighties, when I changed out the auto box for a MOD.I then cleaned out the redundant trans cooler, brazed on two fittings and had hoses to suit the adaptor, using it as an oil cooler.
Just a thought,I'm sure you will come up with something of merit!!
Good Luck!