Line rail clamp for corner post for my chain link fence?

I am looking for a corner rail clamp.

My upright post is 2 1/2 inches and the rails coming off if it will be 1 3/8

I found line rail clamps and end rail clamps online, but nothing that will allow two rails to come off of a center post at a 90 degree angle.
----------------------------------------
There is no such fitting as a 90 degree line rail clamp. Unfortunately a fitting like this would not make a secure bond of the post and rails.

You will need rail end cups in 1 3/8" for the rails.

They attach to the post with brace bands.

There is a 90 degree brace band, but I don't really like to use them. It's just as easy to use two brace bands with the proper rail end cups.

You'll notice that the hole for securing the brace band to the rail end cup is offset to one side. When installing rail end cups either in a straight line, or a corner, position one side with the offset going down, and the other side of the post with the offset going up. This will keep your rail level.