If you're looking for less expensive and quantity, John Scheepers has a nice selection or Brent and Becky's bulbs.
Later blooming lilies...a lot of the latest blooming ones the sources for the bulbs aren't really there anymore. "journey's End' is late and beautiful, but hard to come by. Summer's End is a Buggy Crazy late bloomer, but a source is not available.
Dizzy is a later blooming one as is Sumatra. Black Beauty tends to bloom long and late. lilium rubrum is a real late bloomer too and is one sometimes found out in commerce, also a particular variety called 'Uchida' which is a particular clone of rubrum.
I hope that helps.
