I've bought stuff from 1upkeyboards, mechanicalkeyboards.com, zealpc.net, KBDFans, Sentraq, Originative, WASDkeyboards.com, and Geekkeys. Good experience with all of them so far. There are vendor feedback threads on geekhack that you may find helpful. I'm in the US though so ymmv. I've also had good experience on reddit.com/r/mechmarket but caveat emptor!
Between those sites, they will almost certainly have everything you're looking for unless you need something really exotic.
The price I'm seeing quoted on wasdkeyboards for plate-mounted reds is $25 for 50 switches though. Are you building full-size layout? They're quoting me $41.60 for 104 switches. Maybe the pricing for Sweden is different or something?