Are Reference Points still in business ??

Edensound makes great products and goes out of their way to take care of business. Highly recommend!!!

"They claim to have a superior, patented way of coupling their cones to equipment."

LOL, They all claim something. It's called marketing.

I don't know if your preferred vendor is still in busines but can offer an excellent alternative source for brass points and resonance weights.
The company is called Edensound the vendor is a really nice guy and his products superb. He offers some standard items but is generally willing to custom make what you want. I had 4 very heavy cones custom machined for my amp stand and preamp. He will make it with male or female threading for very a secure interface and vibration damping (critical on my tubed pre. Do a search on these forums for more testimanials. (He uses a lead free alloy for his brass if you are at all coincerned about that.)
NO finacial interest affiliation etc.etc.