B-RB 3690933 spring what retainer?

Humm, The numbers are not the ones listed in the cat. for that cam. these 3/8 valve stem stock heads stock valves. There does seem to be some confusion on what retainers to use with the 3690933 springs. The stock retainers are way to sloppy on the spring and I believe 4452033 is a number for a stock but stronger replacement. The spring is a single spring with damper. Retainer for dual spring can be used with a single spring that I know. What retainer for this spring (3690933) on a stock 3/8 valve?
Thanks!