Right on Railman, ..... and the same goes for the old rippled window glass.
It is not the artisan that pays big, ..... it is the repairer/reconditioner/restorer that pays big.
One can not or should not use a piece of new glass to replace an old broken or missing piece of glass, be it colored or clear. Especially if one is only replacing one (1) of two or more pieces of glass because that "new piece" will stick out like a sore thumb.
I once cabbaged a couple dozen pieces of window glass from an old, old farmhouse and boy did they come in handy back when I was into restoring old furniture. The same goes for restoring a "period" house, new window glass just doesn't "get it".