1969. 1970 or 1971 Rallye Dash Frame "WANTED"

In search of an "in good condition" Rallye Dash Frame for either a 1969, 1970 or 1971 A-Body. I know there are differences between those 3 different years and I am prepared to use any of those 3 years. Not really interested in a 67 or a 68, sorry, just 69, 70 or 71. Thank you