Those three are large Cattleyas, not minis. They are small mericlones now but will get quite big. Most people's windowsills aren't wide enough to accommodate a 6"-8" pot. I can't get to Hausermann's site right now to see what mini Catts they might have. They usually have some.
Not flowering an Epidendrum is an indication you don't have enough light. If the Epi. won't flower, mini Catts are unlikely to flower unless you use supplemental lighting.
Hausermann might have some mini Catts.
Alan Koch at Gold Country Orchids specializes in them. He has spoken to our Society several times and always brings very nice plants. Write to him at
gcorchids@aol.com to get a current plant list. He is also on Facebook but I'm not so I haven't seen the page.
Fred Clarke at Sunset Valley Orchids also specializes in mini Catts. There are a lot listed on his Web site now.