Where do you get your various supplies?

I am building a few boxes and was wondering where everyone gets items like acrylic for doors (as well as hinges, locks etc.) and where you buy your flexwatt.

I am also wanting to install a misting system throughout my boxes and was wondering if anyone had any experience with that and what my options were....

Thanks for your help!

Home depot, or any box store for most supplies, Flexwatt I get on ebay

Home depot or lowes for hinges and such look on kingsnake for heat tape there are a ton of people selling it.