The lady that had them shows up pretty frequently at the shows here in Virginia:
Jeni Benos (978) 758-0487;
www.jenuinelyjeni.com
I don't think her website shows this new style of pendants yet.
She has quite a few size calibers... .38, .380, .40 S&W, .357, .44 and even .50 !
The pendants come with silver chain. Tie tacs and cuff links are also available. Choice of stones are garnet (red), peridot (light green), blue (?), and yellow (I think).
She also has a "flower" type design (shell casing cut to look like flower).
Prices were $48 for .357 and smaller; $55 for .44 cal.
Tie tacs @ $35 & $38; cuff links $66 pair.