How to order ZINC molecules?

Hello Everyone,
I am new to this forum, accept my apologies in advance if my question is not related here. I am almost half done to screen the "clean-lead" subset with my protein. Next step is to validate top 2000 molecules with 4 different conformational states and select the top 1000 among them. My question is how I can order/buy those 1000 molecules and from where.