David, Kodak has discontinued most of their 5x7 safelight filters but they still make a #3dark green in 8x10" size.Stock number is 152-1632. List price is
$73.90 each(ouch) but I could order you one for $60 and I would pay to ground ship it to you. I don't know how easy it would be to cut down but you would end up with two 5x7's. Thanks Jim