68 Charger four link rear suspension

[pontiac charger]

I am in the process of building the rear suspension for my 68 charger and would like to add a non-parallel four link rear suspension.  I want to avoid the use of ladder bars if possible

I am using a Dana 60 rear-end if that matters.

What is out there and who should I use for this?  Are there an good quality systems available?

[Blown70]

Alston chassis works....    heavy on the modified.....