United Kingdom
H W Hyde An extensive selection of hybrids plus species
Rare Plants UK Species
Edrom Nurseries Some interesting specialities
Himalayan Gardens Species lilies & cardiocrinums
Pottertons Nursery Erythroniums & fritillaria
Europe
Lilium Division IX Vast range of species bulblets from tissue culture
Guntis Grants Latvia Hybridises Asiatic lilies
Lukon Bulbs Czech Republic Huge range of Asiatic hybrids
Plant 21 Germany Speciality lilies in small quantities
LetsGrowMe Huge range across different divisions
Lilienarche Germany Mainly martagon hybrids
VWS Flowerbulbs Commercial hybrids from the Netherlands
Canada
The Lily Nook Wide range of hybrid lilies
Pacific Rim Native Plant Nursery Species & North American hybrids
Plant Lilies Wide range of hybrid lilies
USA
Hartle Gilman Gardens Wide range of martagons & other hybrids
The Lily Garden Wide choice of own hybrids
Far Reaches Range of species
Arrowhead Alpines Species
Edelweiss perennials Only ships within USA
Australia
Cam Lilies Tasmania Sells own hybrids plus species lilies
VDQ Bulbs Large Australian supplier
Also worth checking periodically