Those are just NPN in TO-92 cases. With the flat facing you, the pin order from left to right is EBC. You can use any other transistor with the same case and pin order, such as a 2N3904. That transistor is in the transistor, small-signal library. Then just use the value button to change the name to MPSAxx. You will get a message that it has no definable value. Just ignore that and proceed. If you are going to be using it frequently, then you may want to add it to your personal library.
If you come across variations, keeping hunting until you find one that is right for you. I keep both generic EBC and CBE TO-92's in my personal library.
John