Hi from Canberra,
The Chinese/Japanese wisteria is stunning, but can turn into a rampant nightmare if you're not vigilant.
What about Laburnum (AKA Golden Chain or Golden Rain)? Typically available is Laburnum vossii (Laburnum x watereri). Laburnum is not the mauve colour you were drawn to (in fact it's bright yellow) but the pendulous racemes are similar in character. It can be left to grow as a tree, or trained, eg over an arch, or espaliered along a fence. Worth checking out. Here are some images from the internet:
Hope this gives you food for thought.
Stay safe.
Tomás
