And the input to the external monitor is . . . ?
SVGA, VGA, HDMI, DVI etc
try Googling "mini displayport to svga adapter"
Lindy has a selection from $15 to $40 depending on brand or configuration
https://www.lindy.com.au/online/arrs...us=true&cat=rx
The genuine apple adapter is reasonably priced.
eBay has all the made in Chinese options for under $10 delivered
http://stores.ebay.com.au/herofengst..._sid=955785548