How to get Buyer details like email using REST API, Buyer REST API returns nothing

Summary:

I am creating an integration to sync Purchase Agreement data to a third party application. In Purchase Agreement REST API, we get Buyer details like 'BuyerId' and 'Buyer' (i.e. Buyer name). I need to sync this Buyer as a User in third party application. For syncing, I need Buyer Email Id. Is there any way to find Buyer information via REST API.

I checked below API:
GET /fscmRestApi/resources/11.13.18.05/buyersLOV/{buyersLOVUniqID}
Passed the Buyer ID in the URL, but getting 404.

I also tried using GET /fscmRestApi/resources/11.13.18.05/buyersLOV to fetch all Buyer records, but that too returned no data from our system.