Coil Spring Question

[bergy]

I know that this has been discussed a lot, but I don't recall seeing a recommended source for coil springs. I know that I went through about 4 sets before I finally got some from Heartbeat for the front of my '69 BB Pace Car. The car sits perfectly now - was too low. I'm just finishing up a '67 BB Pace Car, and I called Heartbeat to get another set of the heavy duty springs. Unfortunately, they say that they can't get them from their supplier any more. So....I ordered a set from Classic and just received them. I measured them and decided to just send them back because the wire diameter is too small and the unloaded height is too short. When I asked the Classic technical guy about this - he said that they get these special springs from Heartbeat! Does anyone out there know of a good supplier?