There are less available, yes. There aren't many small growers, hybridizers creating and selling their own and as a local greenhouse mentioned to me, they aren't selling like they used to so greenhouses are investing in less of the them.
There is also The Lily Garden (many offering are her own hybrids)
B & D Lilies, offering some commercial varieties not available elsewhere, and partnering with local hybridizer to offer unique but expensive varieties.
A lot of what is out there are the same old varieties we have seen for years, which can be great, tried and true so to speak, but for the grower who wants something new and different, there are few and far between.
If you order from Canada, The Lily Nook is a good source, S-W Gardens and Valley K Lily Ranch. The phyto can be expensive but getting some different things can be worth it. It just depends on what your flower budget has to say about it. At this point I am quality vs quantity.