i though it might be of interest as it is a 12v rated panel at 120 watts and is only a tick over 54" long and 26" wide making it easy to layout in different orientations.
ive no idea of the width your popup tops but thought maybe it would work.
slightly less powerful than a kyocera 135 and a finger larger.
ive seen kyocera 135 for $330 at arizona wind sun.
the shipping for this ramsond brand is $21 and the panel is $399.
i noticed that they have buy it know listings as well as auction listings for their inverters. perhaps they auction the panels as well but are between listings right now (?). some of the auctions for their inverters look like they can be a bargain. not sure about the company and quality though.
125w panel, Morningstar 10 amp charger, 15' wire, and mounting hardware. $419 shipping included. Panel size 26''x48.5''. Doesn't really say who makes the panel but a 25 year warranty?
Power potential: 7.0 amps (125W panel) X 5 hrs sun = 35 amp - per/day
35 X 12V = 420 watt - per/day.