"Yea yea... so where do I get some tiny flint heads?"
Micro points are ordinarily made by striking blades from flint/chert or obsidian but, since it appears you don't know a local knapper, the simplest solution would be locate some broken glass and pick out suitable slivers to fit the bone or antler point you already made. You could glue them in with just about anything, but using something like pine pitch would allow for relatively easy replacement of lost or broken bladelets. Good luck with your project