If you have E3D, ye stick with it, its a great hot end ^^

Well i guess due the name kinda, Its Prusa :P

After that well, I can't see why it would be, it doesnt look to be hard to make imo.
I am kinda thinking on trying to replicate one on a cnc later on if i have some time (Not that you can't do it on a manual, but cnc well its always accurater ^^)