Creating device_class: monetary sensors outside energy integration

I have time-based electrical tariffs and I created a simple automation in node-red using a cron which updates a sensor with the price:

Adding devices via the energy integration using the price sensor seems to give the right kind of result that I am looking for:

That works well enough for an overview, but I have energy metering on pretty much all the devices in my house, so I would also like to create a detailed view to see costs per device, but I want to keep them separate from the overview I see in the energy integration which also displays the energy-usage-graph and energy-date-selection.

Is there some way to do this?

(I have tried the utility meter integration but it’s method of handling different tariffs is terrible so I have eliminated that as an alternative)