Unlike the bigger scales, especially in small scale we have seen historically many vehicles that tow trailers. In the early days of SIKU, when they were making miniature cars out of plastic, we already had vehicles with trailers. Oter manufacturers too always seemed to like towing. Brands like Majorette, Edocar, Matchbox but also the "Made in China" variety always seemed to have liked selling these.
Greenlight recently released a set of 1:64 cars with trailers.