Sundowns have two other international goalkeepers in Denis Onyango and Kennedy Mweene on their books, and the arrival of Brimah has left Ngobeni facing a season without first-team football.
The former Kaizer Chiefs goalkeeper spent last term on loan at Free State Stars, where he produced some sterling performances for Ea Lla Koto to ultimately help them avoid relegation from the Absa Premiership.
"I won't stay, I must leave, I must get a loan,” Ngobeni tells KickOff.com.
"It [a loan move] is what I have always been looking for, but it's on the process."
Ngobeni says there are already three PSL clubs interested in his services, and that he is only waiting for Sundowns to grant permission to leave.
"I won't exactly reveal which teams [are interested in signing him] but I have three options that I need to consider,” he says.
“Everyone knows about Free State Stars’ interest, but the other two teams I won't mention their names because it is still confidential, at least not up until those teams makes it official. But before the end of this week I'm sure something will happen."