Call Ordway. They stock them. I used to buy them all the time.
Intermediate vinyl will be fine.
Coroplast tip: If you are using wire sign holders that stick in the ground,
(like real estate or political signs), make sure the flutes on the coroplast are going the right direction.
If you don't know what a flute is, ask Ordway, they will help you.
If you order them wrong, the wire sign holders won't work.
Good Luck
Intermediate vinyl will be fine.
Coroplast tip: If you are using wire sign holders that stick in the ground,
(like real estate or political signs), make sure the flutes on the coroplast are going the right direction.
If you don't know what a flute is, ask Ordway, they will help you.
If you order them wrong, the wire sign holders won't work.
Good Luck