Sega has just launched their official online store and it is off to good start. They only have a handful of their brands available so far, but the item type is quite varied. It’s mostly Sonic the Hedgehog and in some categories only Sonic the Hedgehog which makes sense for the most part as Sonic is the front runner (a fast one). Hopefully the shop is successful enough to encourage more and forgotten IP’s in the future and hopefully they add more at supersonic speed.
You can get to the shop by going here: https://shop.sega.com