Recently I made some trains from Lego for wooden rails. They looked pretty familiar so I compared them to my old H0 trains and ho and behold they are extremely close in size so I quickly made a bunch of different wagons and trains. They are pretty cheap. The V90 set with all the wagons cost only 30 Euros.
So far I made a DRG Class 80 steam loco with a matching coach wagon and a DB V90/100 with a flat wagon, a cooler wagon, a generic freight wagon and a tanker wagon. I'm in the process to make DB TRAXX and maybe a V43. I used solid bogies with those big wheels. The pin allows the wheels take regular turns. The Traxx will have rotating bogies because that is freakin long, 27-28 studs.
More pix here: https://bricksafe.com/pages/Pendra37/4-wide-trains