By googling wholesale solar panel dealers, one example would be https://krannich-solar.com/us-en/

Assuming you're in the US 48 states there should be plenty of companies that'll take your money for a factory sealed pallet load of panels. They come wrapped up from the factory, basically all they do is do the invoicing/billing to you, they buy them by the 40' or 45' container load and then load them onto trucks at a loading dock.

PV panel factory datasheets will clearly specify how many are on a pallet and how many pallets fit in a single container.