1968 Camaro - Glove Box Lock Cylinder - Need correct GM part number

[Tommy68]

Hi fellow first gen Camaro owners:

I'm trying to replace my aftermarket glove box lock assembly with an original NOS one. I've been able to learn that the correct case and bolt for a 1968 Camaro with a build date of May 68 is GM part 3899887. This is listed in the 68 Camaro FAIM page UPC 1 B2. Now I'm trying to find the correct GM part number for the lock cylinder that takes pear head keys. Specifically, I need an uncoded cylinder so my locksmith can set my trunk key with the glove box lock so they take the same key. Appreciate any help. Thanks. Tommy68