@tvad - I have tried the following from E-bay
Hope that helps - Steve
- Vanguard - not quite as well made as the Sonarquest
- Schuko - but I prefer the aluminum housing on the Sonarquest
- Hi-End makes a nice plug with heavy duty aluminum barrel
- Viborg - but I prefer the aluminum housing on the Sonarquest
- There are some expensive "Carbon Fiber" variants also
Hope that helps - Steve