Yup: See: [link=http://www.rcuniverse.com/magazine/article_display.cfm?article_id=373]Funtana s90[/link]
There is indeed a place for the fuel tank, but there are no supports.
What is provided on the Jetcat, permits you to install the tank facing backward easily, with the stopper towards the rear, which of course is NOT what you want.
The Bobcat .50 and 1.20 is the same.
The Bobcat .25 is similiar but provides for both a tank and electric conversion.