The Results Of My Year-Long Physical Product Experiment
needwant.com
needwant.com
This is glossed over, yet I have no idea how I would even start contacting factories.
For outsourcing, alibaba.com and mfg.com are the big ones. Starting onshore / digital may be good for short run & prototyping. Trade mags and manufacturer associations have local directories.
"We successfully made the transition from being an ad agency with attached warehouse and fulfillment center to being solely an ad agency."
So you never had anything to do with the physical product anyway, no development or manufacturing or anything. Naturally you had to streamline your business process to reflect this, but it's not what I'd call a "Physical Product Experiment".
I'm surprised how much time was spent writing addresses by hand. Paypal Multi-Order Shipping and cheap adhesive shipping labels, which can be found on eBay, take a lot of pain out of that process.