You can order a Chrome Stormtrooper directly from the park. Cost is $12.99 plus tax if you live in California, and shipping starts at $7 for UPS ground. If you take a peak at this page, there are three ways you can order: phone, fax or email. The reason I said maybe is because I have had no luck trying to hail someone using the phone method, but you may be luckier than me. If youre emailing or faxing, youll need the following part number: 4560075. This is actually a magnet set, and you only get it the one figure. But it comes in a neat little anniversary-themed package. Limit two per order.
Update: I've been told that the park can no longer accept any orders at this time due to wanting to save a supply for this weekends Star Wars Days. If anything changes, I will update this post once more.