Frozen Wrist Pin/ TRX 350

Hi people, I have a 2002 TRX 350FM that I'm trying to rebuild the top end. The problem is that the wrist pin is frozen in the piston/arm. After I removed both circlips, I placed a small socket against one end and used a large c-clamp to try and press it out, but it won't budge.
This motor had run low on oil and burned the piston, rings and scored the sleeve. So I assume the pin is seized in the crankshaft rod. The piston is even hard to rock back and forth.
Any thoughts on how to get it out?
Thanks.