This may be just the vine you’re looking for.
It’s rare, not the easiest to get your hands on, but worth a try.
Canary Bellflower vine (Canarina canariensis) is from the cloud forest of the Canary Islands.
Mild climates serve this vine and let me show you (below) what lovely flowers are served up in winter, when few vines are blooming (yes, Hardenbergia vines are blooming).