[sudo-discuss] Smallish SOLAR panel 15 x 40"

Hello Sudoers, Alice rising from the graves here. I am looking for a working solar panel to set on the dashboard of my mega truck to trickle charge / maintain the truck battery. If anyone knows of one laying around not being used I would like to see if this will solve my problem. I need a 100watts so it can produce 5 amps. I am also in the market for a 20 amp controller. I can donate $ to Sudo is there is something to be had - Knowledge of a local sources with competitive prices would also be helpful. Is Urban Ore a reasonable place to look for such an item? Sharing of experience is greatly appreciated. Happy Holidays and thanks Alice