Where can I find a Sentinel?

Excuse me, I'm trying to locate a Sentinel but I'm having some difficulty. Could you please tell me where I might be able to find one? Is there a specific platform or exchange where Sentinel tokens are traded? Alternatively, are there any trusted wallets or services that support Sentinel transactions? I'm quite new to this space and any guidance you could provide would be greatly appreciated. Thank you in advance for your help.