They only offer it for the MBP's but if they didn't there's a simple solution:
Die-Cast mould.
Copied this from their FAQ
Products
What products can you customize?
We can customize almost EVERY computer or electronic gadget in the world. The specific customizations available for your product depend on the material it is housed in. Large plastic products are not typically plated due to the expensive nature of plastic plating however custom jewelry can be made for these items. If you would like to know the specifics about your item, please contact us to request more information. Below is a list of commonly requested items that we customize:
Apple:
iPod Classic
iPod Nano
iPod Touch
iPod Shuffle
iPhone 2G
iPhone 3G
Macbook (Plastic and Aluminum)
Macbook Pro
Macbook Air (and Superdrive)
iMac (20" & 24")
Mac Pro (desktop)
Mac Mini
Apple TV
Cinema Display
RIM
Blackberry Bold
Blackberry Storm
Blackberry Curve
Nintendo
NES
Super NES
Nintendo 64
DS
DS Lite
Wii
Tmobile/Google
G1
Sony
PSP
Playstation
Playstation 2
Playstation 3
Microsoft
Xbox
Xbox 360
Dell, HP, Acer, Lenovo, Toshiba, etc.
Laptops (depending on model)
Desktops (depending on model)
Flat Screens LCD/TVs
Netbooks
If your item is not on the list, contact us.