Get yourself some fresh "Rootone", "Bonide" , or similar rooting compounds and make your own cuttings .
You might be able to perpetuate the species and the qualities that you like thru experimental cross-breeding.
Met-Mom is quite correct about the Cavendish banana - I believe that genetics allow for some 42 genetic generational cuttings,
so it's commercial value declines as its genetic resistance to disease declines.
I've worked with rooting powder and successfully gotten rose cuttings, about 5 varieties, to root. It's tricky. I've not had any luck with clematis and haven't tried anything else.
Some on the garden forum have cloners (Daisy cloner is one) and root tomato cuttings in water. I never understood exactly how much rooting powder I'd use, can look it up or would come with the instructions on the cloner. It's done in constantly swirling water (ionized) which helps the processs.
It took awhile to find a medium that worked but there are a couple I can mix up.
But the poppy, I doubt I could have rooted or cloned that. As I recall I got a couple more buds and brought it inside under my grow lights I set up but knew by then that it would never self pollinate. I doubt I'll ever find another one as pretty as that one but you never know. Once you get them going, they pollinate with other poppies and self seed fairly readily.
redinIllinois: Thank you about my poppy.
exDemMom: Thank you for your interesting post. I've never grown portulacas but seen the colorful ones planted around and in catalogs, pretty pastel colors, singles and doubles, grow well on the grass between the sidewalk and street, haven't seen them for awhile. I don't know how you keep the weeds out as their neat foliage grows low to the ground but doesn't form a dense mat as I recall. A red would be rare I would think, and it's really disappointing when you miss a chance, not so much for the money but for the pleasure of it and making it available to others. Making money is ok, too, though.
I lived close to Santa Rosa for 2 years but didn't know about Luther Burbank's work there at the time. Only later when I got interested in plants did I read about it, shasta daisies, of course, one of my favorites, have one variety still coming back every year.
I was also enchanted with the woman in Canada who bred beautiful lilacs, one lovely pink in particular. Saw one growing in a yard; the foliage was different from other pinks I'd seen and bloomed at a different time. I would have loved to have found one like that to grow. The people got it from a catalog, sent away for it. I can't find the one named after the Canadian woman who bred it (and others). There are lots now, I see but none with her name which eludes me.