Nicole, I highly expect Rayne to start producing some in the near future, as their current recently revived footwear range are heavily based on styles they produced in past years, however the prices will be high - their current shoes coming in at a month's wages per pair for me!
I have a great pair of 1950's/60's green satin and white lace kitten heel boudoir slippers made by them that were sold in Harrods, the only pair of vintage slippers I have found in a large size bar men's smoking slippers.