The trim rings do not seem too hard to find but also look for 1942-48 Mercury which seem to be the same rings. The 1947 K-F trim rings are narrower. The rings that Kanter has illustrated are universal rings used by many auto makers but not by K-F. Both the K-F rings for 1947 and 1948 have ridges in the design and are not the smooth ones that Kanter offers.