I used to have a similar setup to yours (mine was aerial, boy did lightning like that!) Rather than use a 66 or Bix, I brought the PVC into one side of the protector and the OSP into the other side. Could you do something lie this?

A previous installer had a jack on the OSP then the protector then to the switch (both ends.) It worked also - same number of connections/splices as you. I had to replace that setup when I changed protection types after a particularly close strike took out both protectors and switches.