Where can I buy toshi on base?

Excuse me, I was wondering if you could assist me with a query regarding cryptocurrency transactions. Specifically, I'm looking to purchase Toshi coins, and I'm wondering if there's a designated location or platform on base where I can safely and securely make such a purchase. Are there any authorized exchanges or vendors that you're aware of that cater to this need? It would be greatly appreciated if you could provide me with some guidance in this matter.