Tool changer script

I want to use an ATC spindle with a rack tool changer. I was struggling to find some ready-made script I could use and perhaps modify that would fullfill this goal. Is anyone aware of an existing implementation that was tested/proven by some people that does this? I was able to find some carousel tool changer scripts/designs, but I explicitly need a simple rack solution since the machine is a router with 1m length I can use for holding plenty of tools.