Looks like "Newstalgia Wheel" has them in chrome.
http://www.newstalgiawheel.com/wheel_detail.asp?subcat3=1011109
Not sure if they can do the custom backspace though.
that is the wheel i used my local tier shop got them for me through tire rack
and yes i got the back spacing i needed
I'm ordering mine here, best prices I've found and free shipping. They also do the custom backspacing.
http://www.wheelsforless.com/vintage_wheels.htm