Ann, Sorry for the late reply
My main references for PCE exam are
1) O'sullivan NPTE study guide ( I bought it online )
2) Magee Orthopaedic Assessment
3) Kisner and Colby for exercises and manual therapy guidelines
4) The lecture notes from my university
3) clinical oriented anatomy by Moore
I have never seen online test for PCE.....
please feel free to message me if u have any questions
sanchill