I got all excited a month or so ago when I stumbled across this photo.
After a bit of web digging I found the shop in Japan that had taken the photo but I was too late as they had already been sold. However, there was a silver lining as I found Buyee, which for those of you who don't know is the Japanese equivalent to eBay. I'm hoping that'll deliver the goods (eventually) as quite a few Japanese MTB's used Suntour as their OEM.
In the meantime let me know if you find something/know someone.