You would need to buy the sequin fabric
. You can get it here: BabiesGotBling
Then, you need to fuse the fabric with an Iron-On-Vinyl. I got mine from Joanns (my WM and HL sucks...they don't carry it). Don't worry about the fraying as the Vinyl is what will prevent the frays. Cut to size i.e your ribbon. Glue the vinyl-ed sequin unto the ribbon width-of-choice i.e 1.5, etc etc.. I'd suggest a rotary cutter.
Star ribbons, I've seen it on ebay but some (mostly), ordered it from JKM.