Buying Green Coffee Beans

Can anyone recommend a place to buy small quantities of green coffee beans? I’m talking about maybe 10 kilograms at a time.

I used to roast my own beans. Then my life overtook my coffee roasting. Now I have time to roast again.

I used to buy them at Cafe Zihuatanejo on Avenida Cuauhtemoc. Does anyone know whether they are still selling, or whether someone else is?