Just returned from AKL....(an awesome resort)....
No robes provided in the Savannah rooms...perhaps concierge??
Yes...there was one style of robe available in the gift shop there....it was of a "silky" texture...and I believe the price was around $80.....saw other robes (terry cloth) at the Emporium (MK) for around $40.
Yes, robes are provided to concierge-level guests. They are made of a waffle-type, cotton fabric and were great! They were beige and had no logo. I did not see these robes for sale in the gift shop.
You can take the robes in the concierge rooms home with you, and the resort will just charge $75 back to your room per robe. There is a little note hanging on the robe hook that explains this. Frankly, I wouldn't buy one; they aren't my style.