Pegboard vs. slatwall-looking for help

I have used the pegboard that looks like 1/4" MDF but only in small sheets though I have had no failures. The color is different because I sealed it:

I finally got around to ordering a couple of sheets of slatwall (grey melamine)
Does any one know a good place to buy hooks? HD or lowes don't carry them. Also do they have a hook that won't fall out when you take a tool off of it.

Doug