like Pinsanity wrote in this thread
http://aussiepinball.com/index.php?topic=9946.0
pull your door apart or get a new one in Aus and chrome yourself - would not be surprised that it will be half the price as $600 for a door and freight is very expensive.
+1
pinballdecals is a reseller - meaning he buys already existing product readily available on the market, adds his own markup and then sells it to his primarily US customers (who are often wary of buying from overseas where most of the mods originate).
Wow. Come to Papa 
I have had many parts chromed locally (doors, siderails, lockdown bars, metal ramps etc) and besides the mild annoyance of having to take apart and them reassemble the coin door after chroming, it always works out to be more cost effective than buying from overseas.
Note the reflection of the palm tree in the chromed lockdown bar and siderails. :)
