Creating Maps for Custom Geography/Territory

Hi All,
We have sales teams that operate across specific geographies in the US. These geographies are not the default QS supported geographies. How do I combine multiple geographic entities into a bucket or a group to create a map.

For Example,
I am trying to create a map of US where Washington (state), Oregon and California (except LA) combined form a group called “North West Sales” and LA is within a group “South West Sales”. I have a table with Zip to Sales Region mapping.
I can’t create a geographic entity which is parent to Zip on the Sales Region to build a map.

Any suggestions?

Unfortunately this is not possible.

Country, state or region, county or district, city, and ZIP code or postal code are the only ones available.

I am marking this as a feature request as it would be really nice.