That's because vacuum powered is the traditional way in small aircraft and the modern replacements are all-glass based on AHRS.
The number of planes without a vacuum system but with electrical mechanical attitude indicators is quite small. Your best bet are electric mechanical backup instruments used on earlier installations of the all-glass G1000.
Take a look at Diamond DA40 and DA42 for electrical backup attitude indicators, but for example their next models (DA50 and DA62) use all-glass backup instruments.
The number of planes without a vacuum system but with electrical mechanical attitude indicators is quite small. Your best bet are electric mechanical backup instruments used on earlier installations of the all-glass G1000.
Take a look at Diamond DA40 and DA42 for electrical backup attitude indicators, but for example their next models (DA50 and DA62) use all-glass backup instruments.