I have a bunch of caps at 1nF, 2.2nF, 3.3nF, 4.7, 6.8, 10nF. I could post you one of each, or if you live near the Weston Creek area you could pick them up from me. I am working from home, so anytime is good.
Or you could buy some from Jaycar for 10c each I guess.
DC
I actually live in Weston Creek haha (Holder to be specific). Let me do some investigating as to whether my hypothesis actually has any sense at all first and then I'll get in touch.