I'm sure this is an old question, but what have you found is a good alternative?
Numerous options...
Anderson plugs
2 pin bullets
https://www.jaycar.com.au/2-pin-bull...ocket/p/PP2034
EC3 2 way connectors
https://www.jaycar.com.au/ec3-bullet...ocket/p/PT4456
My thoughts are to replace all cigarette lighter connectors from mount leads, skyfi, dew heater etc, and fit inline fuses. Also wire in commensurate connectors to battery packs.