analog buffer
Hi,
Would think a 7414 or similar chip would act as a buffer for the osc signal - its a digital signal so no need for an analog switch.
Don't know if that would cure your problem though - removing a pic while 'hot' is likely to cause lots of problems, the voltage rails for starters, and then any other connctions in common with the two chips; Mclre for instance.
Without knowing what you are doing it a bit difficult to suggest anything else - seems a bit stange to want to remove and replace a second pic chip in a live circuit ?