I agree (see post #9). The links to NESS I gave point to DSS hardware (Tobin), but John has other suppliers for similar pieces.I use something like this as my buttplate:
It sits on my 2" crotch strap, just below the plate. I put a D-ring pointing down in the center, so I have three D's to clip off to. Tobin made a beautiful one, but in his absence I've had to look for other sources.