Hallo CCATLETT1984,
the local Chevy dealer in Germany sells DAEWOO cars which are now sold under the brand of Chevrolet. Even the Opel Dealers which sold Chevrolet or GM cars and trucks before or still nowadays, have no access to the mil parts (There is one in Mannheim to cover the US commuinity). There are some part importers for US vehicles to cover the so called grey market which also have big problems to get mil parts, mainly only with connections to the US Army.
So I did know this (a very good friend of mine is a US car parts importer) after 16 years driving a CD10516 Blazer M1009, needing a set of new ones, got only used ones, for the conversion of my M715 to the 6.2 l DD engine, I replaced the fittings in the block to standard parts which are available. The other side of the fittings is Ermetro in ISO-EN-DIN Standard and relatively cheep. The oil couler I installed behind the front bumper is something of the shelf and can be repaired, if necessary, in any radiator shop in Germany.
For me this solution works great. If some damage, I just go to the any European hydraulic shop and buy replacements. And it does not matter wheather it is 10, 15 or 25 years old. It is industry standard and not depending on the parts delivery frame of a car maker.
This way for you may be a little strange, but here we have basically no other choise.
Wolf