I designed some goods related to Nostr and #nostrasia . Is it possible to sell these at Nostrasia Tokyo venue? (T-shirts, tumblers, stickers, etc.)

My Nostrich friends who come to Nostrasia Tokyo asked me to get some of my products 🙏

If it is not possible to sell goods directly at the venue, how about delivering goods that have been ordered (purchased) in advance on a pre-order site?