The design for Machine Wars Hoist also doubled for Hubcap, here redeco'ed to be a bright yellow not unlike his sports car previous incarnation. It seems like they are two different 'bots that share a name, as this Hubcap is not a communications specialist, but rather a damage control specialist. He turns into a Kenworth W900 wrecker truck, and was available only at Kay-Bee stores in 1997.
The combined form of the Universe Micromaster Aerialbots is Superion, an amalgamation of six robots plus their pack-in accessories that serve as connectors, head, and extremities of the gestalt warrior. While in Japan, the original source of the design ( Sixwing , 1992) was available in a collected set, this combiner needed to be purchased one bot at a time in the 2007 Universe release.