But there is also the Powergrid set sold by NewEdgePerformance.
You might note that those are adjustable
^^^That's why they're more expensive.
If you really want to be complete, don't the SPI cars have a 19mm or 20mm front bar?
I'm fairly certain there's at least one or two models that have smaller (<21mm) front bars.
Once a few corrections/additions are made, I'll be glad to "clean up" the thread for you.
^^^Meaning, get rid of the posts making corrections or additions, leaving only the pertinent information.
Just look what you got yourself into now!!