The closest filter to goldie you can get from camera shops is the Hoya 25A. They don't sell the exact goldie filter
I get my filters direct from glass manufacturer overseas but they require minimum order quantity.
But please take note that you need to use the goldie filter with a full spectrum converted camera to get the same IR effect.
Using the filter with a uncoverted camera will produce different results.
If you can drop by my place, I can let you a try 77mm goldie filter