Wow, I did a little research on the web and yes those bulbs are expensive! I ran across a pretty good page about how to grow Martagon and Oriental lilies from seed (see link below). Check it out and maybe it will be helpful.

Art

Here is a link that might be useful: Martagon From Seed

Martagon hybrid is a great choice for those shady spots in our garden. It is normally planted in warmer climates and in a colder climate, should be provided with mulch.