mike said,
zuzu, I know you've not been satisfied with RVR; I included them because they are the only online nursery I could find that (presumably) carries Singin' in the Rain. It was consistently one of my longest blooming roses -- remember the photo I took several years of it blooming in the snow on Thanksgiving day here in New York? My only complaint about this rose is that the stamens are quick to turn brown and a little mushy while the petals hold up for a very long time.
Hi Mike. Roses Unlimited might have Singin in the Rain. When I checked the alphabetical listing it was not listed. However, when I went to their "rose varieties" page and looked under floribundas it WAS listed. Maybe you could call them and double check. Good luck