I purchased a replica PNC-167 from Moldin' Oldies available from www.siriusrocketry.com several years ago. I can not get to their website on this computer. So I can
not verify if Moldin' Oldies still offers this nose cone.
Speaking of oldies, it is running Windows 98...
I do have an original Centuri Nike Smoke kit that I never finished. It has a two-part vacuum formed nose cone that frustrated me back in the late '60s.
Quest used Metric body tubes, that's why most of their NC's never truly fit Estes BT's. The PNC -167 I believe was a injected molded one piece. 16 mean it fitted ST-16 and it was 7 inches long. used both on Centuri model and Enerjet model.
The Quest cone is for the T35 (35mm) tube, which would be closer to the ST-13, but wouldn't fit anyway.
IIRC, the cone on the Centuri Nike Smoke that I had in the late '70s was blow-molded. I never finished it - screwed up trying to get the correct taper on the fins. I don't have the cone any more, but I don't remember what became of it.