Major Parts KIT for 8X8 CUBE LED - from Furturlec
As you can see (if compared with the Instructables list) it is not totally complete and also they ran out of #10 ribbon cable. They are likely back in stock now or you may be able to get one locally. But this should certainly get you on your way.
The total is just over $40. I will ship it out Priority anywhere in the US for $30. That will beat the 20+ days from Asia.
I have not opened the bundle, but if anything major is missing beyond a 10c resistor I will contact Futurlec myself.
(This is NOT the Tindle KIT)