Hi, Woobili!
Ciara here from Shopify. Thanks for posting. :)
Thought I'd send some resources your way, while you're waiting to hear from potential partners :)
Found this database for US-based manufacturers and suppliers etc
Also this is awesome!! ---> Shopify's Ultimate Guide to Dropshipping in case there are some things in there that might help you set things up :) Sending along this blogpost about finding suppliers for some extra info too :)
I love all the rompers out this year :) Great idea!
I hope this helps :) Good luck with finding an awesome business partner Woobili :)
Ciara G | Shopify
support@shopify.com