Tubular K member design

Isn't every company that's been mentioned here build a similar unit or whatever you want to call it for the 67 to 76 A-Bodies, leaving out what started iot all the 63 to 66.. It seems to me it is becoming more competitive than innovative.. I guess that is why a custom universal mustang II kit for vehicles at 55" 56" complete with R&P and suspension sells for under 1500... Want a link

Crazy World, ain't it, especially when it comes to our cars...