in this moment I owned three couples of JBL studio monitor, 4320, 4430 and now I'm working to restore a pair of JBL C 50 studio monitor.

I think that the louspeakers are C50 SM because the components are LE 15 a woofers, LE 85 drivers with HL 91 horns and LX5 dividing networks.
They are in perfect conditions I 've changed only the woofers' foam.
Some problems on the cabinets. They were painted in black!
So I want to restore the original grey finish and also the original silver grey grill cloth.
Can anybody help me about the original color and also finding the original grill cloth ?