I’ll soon be making my own cassette coffee table. You can either buy one like the featured one for $4950 + delivery (from here) or build your own one using CAD, CNC with a bit of DIY thrown in for good measure. Not sure about final cost but it will be much cheaper !
I’ll be designing it using 3d studio max and then sending the files to the local CNC company for them to cut it from a wood of my choice. I’ll get the toughed glass sorted in the same way. The legs you can purchase from various places online.