dbregman - They should. The Microsoft Store here in Honolulu had spare charging cables.
Indistinguishable - I guess results may vary. My wife and I were at the store here in Honolulu on Dec 20, and one of the reps told us to come back on Tues, Dec 23 because they were expecting a shipment in. She recommended that we get there when the store opens, because they sold out pretty quickly last time (inside of two days). So my daughter and I got there early that Tues and sure enough they had several in stock (L and S sizes only). I picked up two, one for me and one for my wife as well as the free screen protectors. The only thing they didn't have were the $5.00 Starbucks cards. I will say, I am very happy with the Microsoft Store here in Hawaii. They've been very helpful and knowledgeable every time I've visited.