Embedding existing lane/track in custom Instrument

I have a custom Instrument that is generally paired with Apple's HTTP Traffic instrument. Combining them in a template is inconvenient because there is no way to automatically filter to just the URLSession I want. The user must drill down into a long list of sessions and servers every time the instrument is run. The layout is also awkward because my Instrument's output is a long way from the specific HTTP track I want. Pinning these specific tracks is good, but has to be done every time and cannot be saved as a template.

I would like to extract the relevant information directly into my custom instrument, so just the information I want is visible, and in an order that is useful.

I can import the data from HTTPTracing and build my own tables, but is there a way to import the plot itself and reuse it? I would rather not have to re-implement Apple's fairly complex plot. If not, is there a way to access Apple's code for the HTTPTracing plots so that I can add it in my own instrument?