360/380hp crate motor

Guys, I need some help here? I have a brand new 380HP 360 that has been sitting since about 97 and I need to replace the valve springs. Dodge wants $480 for a set and I need to know what rate of springs and also the OD & ID if the factory springs they used. I can buy aftermarket springs for about 1/2 of what Dodge wants. Does anybody know what these measurements are??????
Thanks in advance guys

Jim