We had one at the Plaza in late October. It was not listed on any menu there, but I did see the "Mickey pants" containers behind the counter, and when I ordered one, there weren't any issues.
I think they gave us the option of two flavors of ice cream, a topping (we had hot fudge), whipped cream and cherries... so it wasn't the whole kitchen sink experience from Beaches and Cream, but it was still awesome. I don't know if we could have gotten more toppings on it, as I had to ask the cashier what it came with as there was no menu description there.
I don't remember the exact price but want to say low to mid $20s? There were three of us, so I remember it costing around as much as it would if we all got our own.