Bob Lynch recently discovered that Northstar has plans to sell tray-top versions of its campers in North America. Northstar has sent tray-top versions of its campers to Australia for several years.
Here's a Northstar TS1000 model, built for tray-top use
It would be an easy fit on a Fuso FG. Let's hope that Northstar is willing to sell this version in North America, too!
Read more about the Australian TS1000 here
http://www.freedomoffroad.com.au/TS1000.php
And here's the Northstar page on the TS1000 in USA
http://www.northstarcampers.com/TS1000.asp
Chip Haven
Here's a Northstar TS1000 model, built for tray-top use

It would be an easy fit on a Fuso FG. Let's hope that Northstar is willing to sell this version in North America, too!
Read more about the Australian TS1000 here
http://www.freedomoffroad.com.au/TS1000.php
And here's the Northstar page on the TS1000 in USA
http://www.northstarcampers.com/TS1000.asp
Chip Haven