Excerpt from a March 4th, 2014 article in the Elkhart Truth:

"An Elkhart-based company with a knack for creating more space inside RVs wants to start doing the same for semi tractors. Lippert Components Inc., the leading manufacturer of slide-outs for recreational vehicles, is developing a slide-out for semis to give long-haul truck drivers more living and storage space, said Scott McKinnon, specialty sales manager...........Another company with an Elkhart presence, Modesto, Calif.-based Boyd Corp., could also be involved with the product. Boyd, which now makes a weather-sealant system for RV slideouts at its Elkhart plant, hopes to do the same for semi slideouts, said Boyd president and CEO Mitch Aiello.

See the full article here: elkharttruth.com