Hi Brenda,
I got it from a company called Banggood.com
It did arrive with a couple of problems but it is not worth risking sending back to China.
If you can get from a supplier in the UK that would be best, just in case you have problems.
If you can join a forum and make posts I can't see why you would have a problem with the laser.
The kit from banggood needs two cables plugged up and the laser arm fitted. Which is very simple.
If you get one and need help, I can make a video of the steps you need to make to put it together.