The difference between 1/48 and 1/50 is not much ..you can easily mix both scales and not notice anything out of place..sadly not many models are made in 1/48 ( few very expensive CCM Cat Models) and tons of planes.
I have a lot of 1/50 scale truck and trailers and there are a lots of options like Kenworths from Norscot (W900L and T800), SWORD the T800 W, Mack Granite, freighliner century and Peterbilts, . Drake from Australia K200, T909,T908 and the C500,the First Gear Macks and KW T880, also from Netherland WSI Volvo VN 780 , Kenworth T660 ,Peterbilt 387, KW C500 and Western Star ...and a growing number of Trailers Dry Vans, Tankers, flatbeds, and lowboys so theres plenty to choose from . I dont mention any of the huge array of trucks and trailers from TONKIN due the silly scale (1/53)
still there are many trucks or trailers that never will see the light , at least manufacture in big numbers in this case one have to make their own , I do have couple models that I made like the Freighliner Argosy and Merrit livestock Trailer both in 1/50 scale made using CAD and rapid prototype...I also made a Kentucky Moving Van from Styrene.
