The current recipe can be manufactured. Just chainsaw a bunch of the several kinds of plants that give mycelia. Throw the whole lot of stuff you get from doing so into a storage box, run through a couple smart splitters into more boxes (leaves, wood, mycelia, other) then run the leaves and wood through constructors to turn them into biomass. Finally run the biomass and mycelia through an assembler to make fabric. Add one ordinary slitter and another constructor and you also get a side order of more biofuel for the chainsaw.