Buying a kit makes building an electric skateboard very straight forward. There are a number of good options these days. When it comes to kits you can get motor mounts , pulleys or kits that have all components ready to go. The follow are some motor mounts that might make your life a bit easier.
Motor mount kits
DIY electric skateboards kits
http://diyelectricskateboard.com/ have a nice range of kits. Using a clamp style method which means you can tweak the setup on a squirish profile truck (calibre or chinese knock offs of calibre by the looks). They’re selling a nice range of kits, motors, remotes and Electric Speed Controls (ESC). Starting at $106 USD for motor and pulley kits.
Proto boards
I like the look of this carbon fiber purple-y thing from the UK. However they always seem to be out of stock. I good thing or a bad thing I don’t know.
MBoards
This is a solid version of the Enertion motor mount that they open sources a number of years back when Enertion switch to Hub motor exclusively.
Street Wing
Nice looking motor mount. Sturdy back anodized aluminium.
eSkating
Nice looking variation variation on the same idea with some carbon fibre.
Hobbyking
I don’t know why I put this on here. The mounts don’t fit caliber II trucks, it doesn’t fit a standard motor size and they feel very light. But if you intend to by a complete Hobbyking complete kit they will do a job.
Fiber Skate
Let me know if anyone buys these what they’re like?
Unik Board
Solid looking AL7075. A bit expensive. They sell a range of mounts so check them out.
Xcsource mount kits
I’ve got to be honest I’ve never heard of these guys I found the mount on Amazon and thought it looked interesting/cheap. The company looks to import a range low price items from china to sell on Amazon. The mount looks like it is plastic so I’m unsure about longevity but as a plus its super cheap.
DIYE mount and Pulley kit
Some complaints on Amazon about the mount breaking. I guess that is buyer beware.
Mayitr
Looks like a pretty solid metal kit. The brand itselds sells a whole bunch or random items on Aliexpress and Amazon.