I like that one. it is like my 400w spindle, same mount, yours has what looks like a better speed controller which is good cause the one I got with mine was defective as reviews had warned. I bought a better one similar to yours and it works great. I also added the ssr to the spindle power line for on/off control in software.
EDIT: there is a 52mm spindle holder on thingiverse that works great. I remixed one to have holders for line lasers