My 1981 Vanagon is perfect for our family of 8 (that's right - 7 kids and mother). I'm trying to make it as safe as possible, and would like to add headrests to the back seats. I can feel holes in the appropriate locations along the top of the back seat... Removing headrests from my "parts Vanagon" was a cinch: pull the clips and out it comes. But you need the plastic socket too. Anyone know how to remove the socket? I don't want to destroy the donor seats to see what's holding it in there, but will if I have to.... Thanks for any help! Dan in Northern Vermont