Just an FYI for everyone. After checking forums about an hour ago I jumped out to the Training site to order my XP Pro. I was very dissappointed to not see it out there AGAIN! Anyway, I completed my last 2 training classes available, and went back to the prize shop, still no XP. Finally I just kept hitting refresh off and on for around an hour while surfing the net in another window and all of a sudden XP Pro appeared right under the Zoo Tycoon title!!! So the moral of the story is keep trying and hitting refresh, maybe you'll luck out like me.
Goog Luck!!
P.S. I was only able to order 1, and it "cost" 2500 points.