re: Collet Source

That's great they're making them and have sizes beyond the normal 1/4" and 1/2" but they're not particularly cheap, not that anything is after allowing runaway inflation.  I find used PC routers regularly for between $15 & $25 and I'll buy them all at that price if I don't have to go far out of my way to get them.  Often they'll come with both collets which makes the router itself essentially free.