This is used inside many of the GM heater core housings.. retains the heater core into place.
Not known on RHD cars unless somebody has retro fitted them..which is always possible.
Expensive yes.. purpose remade at a decent R&D cost.. for minimal sales.. but at least its available.
Spring steel Blue heater core retailer clips.
For mounting heater core into the heater box.
Applications but not limited too:
67-81 F-body Camaro & Firebird 64-72 A-body/
68-79 Nova/ 71-74 Ventura/
73-74 Omega, Apollo
65-70 Fullsize Chevy
66-70 All Pontiac/
69-72 Grand Prix
65-70 Olds
65-70 Full Size Buick...