Just now I came across a couple of dealer in-stock listings for the Pa600 in the U.K.

First one was on eBay UK showing 2 available and 2 sold and in stock for next day delivery. When I checked this company's own webpage it shows 3 in-stock. Check http://www.instruments2go.co.uk/Korg-PA600-Arranger-Keyboard-p-5104.html

I'm hoping this is real and heralds the delivery of the Pa600 to other dealers too!!
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Monty -- KORG Pa600