Wow shipping is killing me! Please help

I recently decided I want to try using those plastic planter tops for off the ground pens.I have been looking all over and the actual plastic tops are not to pricey but the shipping is insane, it's $244 for 16x4 ft and $580 to ship to Maui wth. Are the any free shipping green house places with these planter table tops things ?

Maybe find a gardening supply there in Hawaii that builds green houses? They might be the best bet for those panels. If they can get them sent by ship in bulk, that would cut the shipping costs. Or find a pot grower and see if they'd sell a few of those panels?