The only variegated crinum I am aware of.  Although tropical in origin, this can survive winters in areas where the soil does not freeze.  The flowers are lovely, but this plant will always be interesting even when not in bloom.  It is worth taking inside for winter enjoyment in colder areas.

For sale are bulbs that are an inch or more across and several inches long.  An example is pictured.  The leaves will be trimmed for transport, but they re-grow quickly.