I ordered one from logee's, they have several kinds of holiday cacti you might like. Just type in "Christmas Cactus" in the search bar at the top. It will show you a few good ones to choose from.
I hope you find something you like!

Here is a link that might be useful: logee's

I've had good luck ordering from Whitton's Greenhouse but I'm not sure if they are open for the summer? You can always email or call... They do not sell the true Christmas Cactus but sell the "Thanksgiving Cactus" just to clarify....

They sell small starter plants in different colors...

http://whittongreenhouses.com/mailordervarieties.htm

Here is a link that might be useful: Whitton Greenhouse

bump

I ordered mine last fall from Bob Smoley's and was very pleased. I was able to get the ones I wanted. Did you call and ask when they might have the ones you want? The lady I talked to was very helpful. I had wanted to order some more at a different time and she told me that a good time to order was late summer when they had restocked but before the big rush for them.