Equinix has a pretty big pop out in AMS. I'm sure if you contacted them they could hook you up with a reseller that could provide the support services you need. You probably don't want to buy direct from them as it's quite pricey unless you buy in quantity.
if you're looking to rent a server, look for a good datacenter, and then find the ISPs in it - it's rare, but not unknown for ISP to own/manage it's own datacenter anyway. We-Dare datacenter in rotterdam is pretty good. The ISPs there are listed at:
a couple to note are i3d and serverboost. You can browse all the other datacenters, and check the ISP websites, and send out a few emails. To see the list of datacenter locations see: http://www.datacentrumgids.nl/overzicht
Click 'Nederland' at the left, and either browse the entire country list, or narrow further by selecting a city link if you prefer.