GreekChat.com Forums - Sorority charms/beads for Pandora bracelets?

Does anyone know of a good, reputable place online to purchase sorority charms or beads that are compatible with Pandora bracelets? My daughter is a Phi Mu, she graduates in December and got engaged a few days ago, so I'd like to get her a Pandora for her graduation and buy the charms for graduation and engagement. I'm sure she would love a charm that represents her GLO also. Pandora doesn't sell sorority charms. I checked out the Phi Mu website, but there was nothing on there that would work. I did a search on the internet and found a few places who sell the charms, but I would feel more comfortable hearing recommendations from anyone who purchased from one of these sites. Any advice would be appreciated.