EKP are good EXCEPT for 8BA nuts, there others are all single chamfer turned nuts but the 8BA are pressed and not quite a true 8ba hex. I don't think they can now get the 8BA stock hex so just you in the formed 8BA nuts.There washers have also gone down hill over the last few years being nearest metric rather than old BA spec.
I use Emett who have a stand at the Guildford show but you might want o try BABolt