Try using  a WW2 Dynamotor they convert 12 Vdc or 24 Vdc to a 400 cycle output, there may even be a 3 phase type. 

Hi, I have searched the web far and wide for any information on this gage or the name of the type of connection . I know that typical avionic fuel gages use a minimum of 3 wires Here is all i can extract from it :-Avien -specification # AN-G-31a-part # :162-043-161-Ser #: 94247 (not helpful) this device has 10 pins. it seems that it would be able ...