Matias products:
http://matias.ca/products/
Matias Wired Aluminum keyboard for Mac - $59 USD
http://matias.ca/aluminum/mac/
"A worthy successor to Apple’s original WIRED aluminum keyboard.
If you’re looking to replace a (now discontinued) wired Apple aluminum keyboard, this is the one you want… The Matias Wired Aluminum Keyboard offers everything the original had, plus a little bit more."

Ist wohl leider noch nicht lieferbar ...