Of course I've bought parts from cip1, Mid America Motorworks, ISP West, Bus Depot, and Wolfsburg West.  For the Splitty I seemed to always lean towards Wolfsburg West.
But I was looking for some parts specific to my '59 Beetle and come across this website.  They have a lot of unique early beetle parts and they seem to have resonable prices.  I haven't bought anything yet so I can't vouch for their service and/or quality.  www.eisparts.com
Just thought I would share my find.