i have a proper sturdy twin axle car trailer which is made out of more steel girders than london bridge

the trailer was built in circa 1800 lol, well maybe not that old but certainly over 20 years old and thus my problem of the wheels. it uses some 5 stud stb axles with a very strange pcd that i'm wanting to change.

does anybody know of a vehicle that uses bolt on stub axles that is common enough to get from a scrap yard to change these over?