Semroc does in fact sell the BNC-60AB Gemini capsule.
BMS supplies this one as well.
As an interesting side note, I have one of each and I have found the as delivered finish/sanding on virtually all Semroc cones is much nicer than the BMS produced cones.
I replaced the Gemini capsule in my PDR K-21 Gemini Titan that was by BMS with a Semroc one to save LOTS of sanding/extra coats of Balsa Fillercoat & sanding Sealer.

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When in doubt, WHACK the GAS and DITCH the brake !!!

Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't !
Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY.
ALL systems are GO for MAYHEM, CHAOS, TURMOIL, FIASCOS, and HAVOC !