The prevailing consensus about violet id, is if it didn't come with a tag, it's 'No-Id'. I agree, it doesn't look like Winnie Woo.

I am more interested in the flower form and color than the leaves. Can you suggest one that has very similar flowers?

Actually this type double blossoms are not common. Look at the new releases of Optimara;

https://selectivegardener.com/specials-recent-c99/ - they have kind of similar blossoms in different colors - Crater Lake, Sequoia, MyWildSide. Not exactly the same, but something you probably would like and - the good part - you could purchase. You can go through the First Class and find something closer - but if it is not available..

There is a old Russian variety that is classified as a standard trailer, but it is not growing really neatly. Blossoms are fantastic and large - "Lituanica" or 'Lituanika'

It is often available on ebay... not that I would recommend buying anything in winter.

Fun, Irina!