I was looking for something else and stumbled across:
QFlightInstruments | Marek Cel - https://github.com/marek-cel/QFlightinstruments
The QFlightInstruments contains following flight instruments widgets:
Airspeed Indicator
Altimeter
Vertical Speed Indicator
Turn Coordinator
Attitude Indicator
Heading Indicator
Electronic Attitude Direction Indicator (EADI)
Electronic Horizontal Situation Indicator (EHSI)