Searching "P-channel logic level FET" ...
Well, this one would be an excellent choice but is in a "DPAK" format - small but somewhat easier than a SOT-23.
This old one would appear to be adequate, not logic level but since you are going to drive it with at least 10 V, it should switch your 2.5 Amps easily with no heatsink.
And it is in a TO-220 package.
(By all means, someone can check my reading of the datasheets. 
)