Amazon has the Renogy 100 Watts 12 Volts Monocrystalline Solar Panel on sale today (4/17) only for $110.
https://www.amazon.com/Renogy-Watts-Volts-Monocrystalline-Solar/dp/B009Z6CW7O/
I have no experience with these, but they have good reviews.
I use one on my sabre, works great.
Shawn