Hi cmessmore, I have used cellphoneshop.com to get a spare charger. Fine transaction, fine charger though it takes a lot longer than the charger attached to the phone.
Problem is I can't find the spare charger all of a sudden. May have to order another.
I have never tried cellphoneshop, so I cannot comment on their service. I got my back-up charger from Droid X Accesories. I've used eaccess for my previous phone (blackberry), and know from experience they aren't overly expensive and sell good quality products.
Cell phone shop is great to deal with. I have ordered many accessories from them, never unhappy. Try a site called Hand held accessories they're good too