Besides the Church-9100-preamp, you should also check the SP-preamp, SP-preamp-11, MM-preamp, and the Church-ugly.
www.soundprofessionals.com
www.microphonemadness.com
Retail-section here at
TS.com for Church-preamps.
If size is an issue:
smallest to biggest:
Church-ugly(9V) and SP-preamp-11(12V)
SP-preamp+MM-preamp using same case with 9V battery
Church 9100 with 9V battery and Highpassfilter