Where would you buy stock shackles and springs for a 73?

[WH23G3G]

If you had to buy new rear springs for a 73 with a 400 where would be the best place to purchase them? Stock would be fine, but new or reconditioned, no used. Would OEM shackles from a parts be ok? I just want stock leaf springs for stock ride height and ride quality. The ones I have on mine now are unknown to me. I don't know if they are the original ones for when it had a 318 in it. But they look like they have too few leaves to be stock. The guy had put traction bars and high-jacker spring assist shocks on it. I want to yank it all and install stock replacement. 

[Shakey]

I bought my leaf springs and all of the mounting hardware from a company in Detroit called Eaton Detroit Spring.  They were a bit more than others offered but I had heard that their quality is second to none.

http://www.eatonsprings.com/

There are other places like ESPO in PA http://www.espo.com/ which I have heard good things about and you can also get them from the local Chrysler dealer but I have heard some not so good things about those.