Looking for umbelical connector for power/data to instrument panel

My Libelle 301 has a fully removeable instrument panel. It's already got quick (dis)connects for the electrical system and the pnuematic system. The connector for the electrical system is out of pins however, and is a little bit wonky. This means I want to replace it, but with what...

Requirements:

• Male and Female cable-mounted variants available
• At least 2 pins should be rated for 10A+
• At least 27 (maybe 17) contacts
  • 2 power
  • 3 microphone
  • 2 SC/Vario switch
  • 2 PTT switch
  • 2 Radio speaker
  • 2 Nose flasher
  • 4 FLARM (can be omitted, but prefer not to)
  • 6 Flap sensor (can be omitted, but prefer not to)
  • 2 Speedbrake switch
  • 2 Wheel switch
• Reliable locking mechanism

I'm currently considering using 25+2 DSUB conenctors; they have 25 data pins and two dedicated power pins capable of tens of amps. They are sturdy, locking, affordable (about $50 for a complete set), easy to use due to the solder cups, but they're pretty bulky.

Any tips/hints/thoughts?