Pre-fire means a
Scamp 13 that’s 2006 or older (and without roof A/C to stay under 90"). Many other older units will also fit the bill, including
Boler (and numerous clones),
Trillium, and others. There are also pop-top models by Hunter and Trailswest. Just watch out for units with a modified, raised suspension.
Lots of possibilities, but you’ll have to take it on a case-by-case basis.