I'm interested in creating my own starter cultures.
I've found a few facilities which offer to create probiotic formulations, in exact amounts, by kg and density but I would rather start with a recommendation from someone with more insight on how this process works. Also, I'm looking for lesser known and very specific strains (e.g. Pediococcus, Propionibacterium, Weissella, etc).
Could anyone advise me on the best way to proceed and if possible, the contact information of a fermentation facility?