All the 110 oil coolers were pretty standard. They either tapped into the right side clutch cover on the main oil line after the oil pump or they tapped into the oil line into the head on the little finned cover. There were 3 or 4 makers. The most common was probably Hayden. I have several NOS kits still in the box. Not for sale.
Nicholson 500x (Project)
Nicholson 185s
Nicholson 110 (That takes an atc70 tank)
Ascott 500 head/350x (Project)
Homebuilt Racer Chromoly Suspension 110 (Ragin Runt)
PK Racing Suspension 70
A+ Inc Suspension 70
AWS Aluminum 90 frame
Hi Performance ATC Suspension frame rd350
Hi Performance ATC Suspension frame 90