I can't seem to find any info on allakhazam on this:

I'm in a linkshell on one of my chars, and there's a couple of people I'd like to invite in--Where do I go and what do I do to get linkpearls that go with my LS? (Primeaux on Alexander)

Secondly, supposing I want to start one of my own, how do I go about doing that.

I don't want to ask on my LS, because I want to reimburse the guy who gave me my linkpearl, and those folks are too all-around nice to let me know a realistic price on what those buggers cost.