Sounds like you got what you needed covered, but I was going to suggest that you stop by a local shop that builds systems. They likely have quite a bunch of left over screws and stand offs. I was in a similar sitatution and stopped by my local Computer Renaissance store to see if they would sell me a few. The tech just handed me a box full of assorted screws and stand offs, which they wouldn't even take any money for when I offered. Although I buy most of my stuff on line, I've made a point of picking up at least a few items there, since then.
Space