We finally have our adapter/spindle spinner retainer clips .
Unlike "diaper clip" versions these will work with hub end caps in place and have a race car design.
Stainless spring steel and easy to install ,link below.
1 x set adapter/spindle safety clips : Vintage Wheels, Hot Rod and Muscle car
If above link does not work please go to:
vintagewheelsus.com select adapters etc from the menu
Bob at Vintage Wheels