[willkat98]

Maybe I can help from the personal side, to the business side.

Take a container, lets say 6"x6" (baking dish?) and add 1" water.

Put in freezer

Once frozen, remove from pan.

Place in cryosuck bag.

Suck

You now have a 6"x6" shipping block of ice, not dry ice, that can be used in a styro created box (line a box with styro, nothing fancy) and you have a solid 2 days shipping at least (3-4 in the winter depending on destination) with pre-freezing product.

On the personal side, I ship stuff like this year round, and always arrives frozen in the winter, partial forzen in the summer.

Good luck!