Rae from Shopify here. Thanks for reaching out and posting this question.
Retro fashion is a great product niche to be in. There are a few different apps in our App Store that I recommend using to source suppliers from for these types of products. Check these out below:
Each of these apps supply products from the USA, with a few suppliers also based in Canada and Europe as well. To find products relating to your store, open each of these apps and search ‘retro’ or ‘vintage’ in their product catalogs.
Please keep in mind that these apps may incur additional charges for usage. To find out if this is the case, make sure to reach out to the app developers directly under the ‘Support’ section of their app pages in our App Store.
Lastly, we have a really helpful guide that covers everything you will need to know about setting up a dropshipping store that I wanted to include. Please check this out here.
Let me know if you have any other questions or concerns!