While doing some research I cam across the web site http://www.lilliputweb.net which seems to be the US Lilliput web site. I emailed them to ask about retail locations, they said they sell direct and will have more VGA monitors in stock on November 26th.
618GL-70NP without touch scree is $245.00.
618GL-70NP with touch screen is $299.00.
Shipping is $12 UPS Ground
They also have the headrest mounting brackets which was something I was looking for.
I spoke to John Xu by mail (johnxu "at" lilliputweb.net), he was very helpful. Mention the forum if you make contact then he can see where the interest comes from.
I have no connection or affiliiation to Lilliput, I just thought another source may be useful.