The reason for Lintilla's cloning. They are the largest shoe corporation in the galaxy, and produce over 1.72 million shoes every day. They produce shoes in all sizes, for all species (even Vogons) and more.
The name may seem to be a portmanteau derived from the names of four shoe shop chains found on Earth (and in the UK) at the time of its destruction: Dolcis, Freeman Hardy Willis, Saxone and Lilley and Skinner. However, the presence of London's Oxford Street in the Dolmansaxlil promotional video shown to Arthur Dent suggests the opposite; that the names of those chains may in fact have been derived from that of Dolmansaxlil.