RE: CEN WAVE SHARK
You could buy the supervee brushless on towerhobbies.
or
[link=https://www.unitedhobbies.com/UNITEDHOBBIES/store/comersus_viewItem.asp?idProduct=4187]motor[/link] or this motor with a 5mm shaft [link=https://www.unitedhobbies.com/UNITEDHOBBIES/store/comersus_viewItem.asp?idProduct=2077]5mm shaft motor[/link]
[link=https://www.unitedhobbies.com/UNITEDHOBBIES/store/comersus_viewItem.asp?idProduct=4316]esc[/link]
hope this helps,
mike