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That's a very attractive chart. Although I've not seen that exact chart before, most of the underlying principals in it's creation are well documented.
Funnily enough, I've copied others work to create the very "bubble chart" you said to ignore.
These are not direct "how to" articles, but should provide insight into how to build just such a chart:
Hope these help, please share your successful results!
Thank you. These are very helpful