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Rough equivalents to Wratten 44a?

Lenses & Lens Accessories - www.largeformatphotography.info
I'm looking for a rough equivalent for the Wratten 44a; a minus-red filter. Ideally it would have a very similar transmission cutoff, around 575nm. My wratten 44a filter tore recently, and it looks like it'll be expensive to replace. These little gelatins are way too fragile. It'd be nice to get a more durable replacement.

I've been using it to meter for my EB/RA x-ray film, so that I don't get wildly different results in different lighting conditions. So far it has really helped me out quite a bit. The sensitivity of EB/RA ends at almost exactly the same wavelength as transmission for the 44a.


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