If you've got an Extractor module pulling ingots our of your furnaces, you could put a Passive ItemSink module in a chassis pipe attached to each of your ingots->blocks autocrafting tables, then another Extractor module to pull out the blocks.
Also note that you'll want to have an ordinary Crafting Pipe configured in the usual way to break the blocks back down into ingots.
If you want to do that and also keep a certain amount of ingots on hand, you might be able to do it with a Provider module and a Supplier module in the same chassis pipe attached to a chest, if those modules even exist. Placing separate Provider and Supplier pipes on the same chest will not work well- the supplier's requests will be filled by pulling out of the very same chest it's trying to supply.