You can try here. It is actually not all that rare a plant and is often found at this time of year in nurseries and places that feature flowering houseplants

I thank you, BUT it IS rare. It is not the new upright big lobster clawed like stemmed ones.That are at Lowes/Home depot, only places i have scene X-Mas cactus this time of year.

And they ONLY sell the NEW types. ***** I went to the Etsy site you recommended, and people that bought the affordable ones all said they got 'JUNK and not to buy', the others listed are either WAY to expensive, add in shipping, or the wrong color. It is better to get or buy from a person that has an old big specimen, and cares about it, and knows how important this plant is to some people.....like me

As i just typed to someone else,in the cacti forum, that told me a place called Matts Garden, grows them, I told her that I TALKED to MATT today, out of sheer luck,and he said he stopped growing them years ago, they are to much trouble to grow. They droop to much so shipping is impossible, they rot to easily, and they need to be repotted frequently, mine rotted away but took a long time. Mine rarely needed repotting, it loved to be tightly potbound, and the drooping is the part WE/I love the most, and the flower. Notice the prices of these plants/cuttings, they are all over the place, and dont know if it is the one I had. But notice they come from 120yo plants? NOT new ones?

I have one. My Grandmother received it from her Mother-in-law. It is over a hundred years old. I will happily send you some cuttings