Assay Depot may be able to help you find some suitable providers and obtain pricing/feedback from our vendor network. If you're still interested in exploring options to source cytokines and growth factors, you can submit a description of your request through our free service, Assay Depot Express (
https://www.assaydepot.com/pages/express), and our team will work to generate a report of vendors and their responses for you to review in your vendor selection.
Also, it may help to know how much you're trying to source as many vendors offer discounts on bulk orders.