If you are using RP2, and I dont see why anyone who uses IC/BC would NOT use RP2 there is an amazing solution
After I setup the factory and left for a bit I came back and all 640 of my empty cells were filled up
Allow me to elaborate.
Around lvl 10-13 there is usually GIGANTIC lava pools. Setup a BC pump there, with a bit of work you can have steam engine operating the pump, being powered by the very lava it collects. Send the lava you collect to your processing area, wherever it may be. Basically you connect the waterproof pipes to a tank for storage.
Next, you connect a deployer to the tank and keep it filled with empty buckets (ill explain how to)
Connect filter to the deployer and set lava bucket as filter
Connect the filter to a chest with pneumatic tube (all your lava buckets will go there)
Put all your empty cells in the same chest
Put automatic crafting table next to the chest with the lava cell receipe as filter
Finally, connect another filter to the chest, this time with empty bucket filter and send all the empty buckets back to deployer with tubes.
The way this works is deployer "right clicks" the lava tank with a bucket, filter pulls bucket out to chest, automatic crafting table using the stuff from chest makes lava cell, empty bucket gets sucked out by the 2nd filter and sent back to deployer.
I used the same method for water cells, then linked up the water cell output to extractor and created all the coolant cells I needed to make my 6 chamber reactor + its contents
Hope my explanation was clear enough, gl.