I think the Rosalie Dixler clone was lost. And might have been tetraploid? Not sure about that. So the exact remake might be impossible. Sometimes a particular combination of clones is just magic and other grexes just suck.
A remake has been attempted. I know because I tried.

And I think Chuck tried it again. The last couple years have been pretty rough for phrag flasking. I didn't get any back from the lab...
Although I have a spectacular Barbara Leann (in bloom now, actually) I either killed (or sent to Chuck, hopefully) my only Rosalie Dixler. And honestly there are newer hybrids that are an improvement on Rosalie Dixler so serious breeders (of which I am not) have probably moved on.