Anyone know where to purchase one of these range finders, can not find here on Phuket, I have found the Nikon laser 550 price nearly 10,000 bht I think the Bushnell's are a bit cheaper, any help is much appreciated.

Try this link:

http://www.mhakimi.com/other_laser_range.htm

or you can buy on ebay. I did and was lucky enough not to pay any custom duties.