Where's the best place online to buy paracord ends? Preferably ones that will clean up two loose ends.
If you don't want to buy anything, why don't you try slightly burning the ends of the cord? The end will melt a bit then it will be plastic-ish and will work well
You might try Lighthound.com for some lanyard closures, cord locks, etc... Creative Designworks also has some attachments. County Comm has similar items, but their shipping is higher, so it's only worth it if you have a large order.