You should be able to mount a through hole socket as if were SMD. Bend the socket pins/tails out at 90 degrees so they rest flat on the PCB. You may have to design a PCB part to fit the socket pins. Use a double wipe socket (not machine pin) and take care when bending the pins to make them uniform.
Is there a reason you can not drill the holes and use a through hole socket?
How about using a SMD PIC that fits in a SMD socket?