Back in the 1990s a very good friend had been working some deals in Eastern Europe on more than one visit. This resulted in importation of both ammo & arms from Yugoslavia. I do believe he also went to Ukraine, where a lot of those Soviet K98ks, K98 & K43 ammo pouches, etc. were imported from (but not by him). While there, he was shown a moored vessel (perhaps on the black sea). He said it contained all the "oddball" arms captured from the Germans... G41s, G43s, a myriad of sub and other MGs and even a few Fg42s, etc. He also saw a German field waffenmeister's wagon, with benches, service tools and spares... preserved as it had been captured. I asked him about bayonets & frogs and was told the frogs had been burned and bayonets smelted down because the authorities thought there was no value in them. That was as far as it went. As time went on, it became much more sketchy dealing with anyone over there. The price of doing business was rife with greed, graft and everyone in the line of possession, processing, transferring and loading had to get their taste or your deal could get torpedoed for good.
Regarding the advert on post #8, that looks like one from Golden State Arms. They were a big importer in Pasadena, Ca. until the GCA '68 shut the door on their business. I know large quantities of pistols, etc. came to them from Norway. Lots of rifles were exported out of Belgium as well. A acquaintance of mine (Warren Odegarde) worked there for many years. It was true that back then, complete arms were charged a higher importation tax than arms parts to the USA. This lead to arms like rifles having the bolts removed and shipped separately from the actions. On one occasion, a shipment was stored on the docks in Belgium (I guess Antwerp) and a pier containing primarily the bolts burned and collapsed into the sea. The shipment was still sent, but most of the bolts were lost. So, they began advertising and buying up Mauser bolts all over the USA to slap into the boltless ones they had brought in...