I bought this Ghent Audio case
https://ghentaudio.com/kit/ncore-se-300w.html (I actually used eBay for mine, but I do not see a listing for the case right now). I then bought the Amps and Power Supplies from DIYClassD.com in The Netherlands (2) NC400s
https://www.diyclassd.com/product/nc400/11 and (2) SMPS600N400s
https://www.diyclassd.com/product/smps600n400/36 ). Total cost all-in with shipping was about US $1,200.00. There were a few hiccups along the way - the screws supplied for mounting the LED board were TOO SHORT - I had to go to a hardware store to replace them. I struggled with the soldering a little. Overall - I am very pleased, though - I would do it again. I did not want two separate mono amps, otherwise I would have just bought the complete kits from DIYClassD.com.