In theory the following Hobbyking ESCs may be able to use the brushed motor firmware that the TZ-85a uses. I'm purely basing this on the fact that flashing the TZ-85a with simonK brushless firmware uses the bs.hex file so any ESC using this file might be able to be converted. Happy to be told I'm wrong though as I'm no expert.

HobbyKing 6A ESC 0.5A UBEC
HobbyKing 10A ESC 1A UBEC
F-40A
F-60A
F-80A
F-90A

If you want to give it a go, use this link to find out about the pins you'll need to be soldering the programmer to unless you have one of those flash tool pin things I've seen others using.

https://docs.google.com/spreadsheets...9Pk/edit#gid=0