Load send for next unused bus / create track

Hi folks
I'm trying to figure out a way to build a macro to help set up a new send in Logic, create a track from the bus and rename it.
The manual steps to do this are:

1. On a track, click the next empty send slot
2. Choose the next unused bus
3. Go and find the newly created bus
4. Rename the bus (to whatever is needs to be)
5. Right click on the bus and choose 'create track'

I can't think of any steps using SF that can help with this and wondering if anyone has a workflow that might help?
I've played around with the sends loader which works great if you know which bus you want to send to, but can't find a way to choose the next unused bus.
I've also no idea where to start with a function that goes and finds that bus that was just created.

Any ideas?
Many thanks :)