Just found some 6pf caps at the Shack.  Look for package 272-806.  This is
a pack of fifty (50) pf ceramic caps.

        Pack contains:
                3ea - 1, 2, 3, 4, 5, 6, 7, 8, 10 and 12pf
                5ea - 15, 18, 22 and 33pf

Also,  check out Dallas Semiconductors site
http://www.dalsemi.com/DocControl/PDFs/pdfindex.html for their 32.768 KHz
TCXO  clock oscillator.  It has an error of +- 4 min/yr.  Looks like it
does not need external caps, just power, ground and the chip you want to
connect it to.

Brian