This article talks about if 3D printers are still a viable product. The first thing I did is a search for it on google shopping. I was able to find 3D Printer Online Store website and saw that there are lots of brands on their store. I searched each of the suppliers and found out that some of them are US based and some are from China.
I can suggest that you can get the US-based suppliers. Contact them if they do dropshipping. Once you are able to confirm that they do dropshipping, you can build a website and contact them again if they can supply for you.