I know you probably already have a stable supplier. I am looking for you because I want to cooperate with you. You can also add a new supplier as an alternative.
I know you may already have a stable supplier at the moment. I came to you to collaborate with you, and you can also consider adding a new supplier as an alternative
I know that you may have a stable supplier at present. I came to you because I want to cooperate with you, and you can also use it as an alternative to add a supplier.