Hey guys. I'm building a DE-K for my Max and I wanted to get a stock diameter lightweight crank pulley. I would get an underdrive, but I'd rather not lose my system. I'd prefer to get one locally, but I'll pay for shipping if I have to. Let me know.

What type of system do you have?

I have a 1000W monoblock Power Acoustik pushing two 12inch Polk DXIs.

You won't have any trouble running an underdrive pulley only pushing that.
I highly doubt you will find a stock size lw pulley either.