Below is the the original data of Wray et al. reported as extinction coefficient for hemoglobin in mM^-1 cm^-1.
[Note: in Figure 2, I have scaled the Wray data by a factor of 5.4 to convert to absorption coefficient in units of cm^-1 for whole blood with 45% hematocrit.]
nm OxyHGb DeoxyHGb 650.00 0.50600 3.7430 657.00 0.45900 3.5460 663.00 0.43500 3.3260 670.00 0.42700 3.0430 677.00 0.42500 2.7130 684.00 0.42000 2.3920 691.00 0.41500 2.1080 698.00 0.41600 1.8870 705.00 0.42700 1.7200 711.00 0.44400 1.5790 718.00 0.46600 1.4500 725.00 0.49000 1.3430 732.00 0.51700 1.2860 738.00 0.54600 1.3070 745.00 0.57600 1.4120 752.00 0.60800 1.5740 758.00 0.64100 1.6780 765.00 0.67500 1.5900 772.00 0.71000 1.3650 778.00 0.74500 1.1490 785.00 0.78100 0.99900 792.00 0.81700 0.90800 798.00 0.85200 0.85200 805.00 0.88600 0.81600 811.00 0.92000 0.79600 818.00 0.95200 0.78500 824.00 0.98300 0.77900 831.00 1.0130 0.77800 837.00 1.0430 0.77700 844.00 1.0700 0.77800 850.00 1.0970 0.78100 857.00 1.1220 0.78800 863.00 1.1460 0.79700 869.00 1.1670 0.81000 876.00 1.1870 0.82400 882.00 1.2040 0.84100 888.00 1.2190 0.85800 895.00 1.2320 0.87300 901.00 1.2430 0.88500 907.00 1.2520 0.89200 913.00 1.2580 0.89200 920.00 1.2610 0.88300 926.00 1.2630 0.86500 932.00 1.2630 0.83600 938.00 1.2590 0.79900 944.00 1.2550 0.75500 950.00 1.2480 0.70200 956.00 1.2390 0.64500 962.00 1.2260 0.58700 968.00 1.2130 0.52900 975.00 1.1970 0.50100 981.00 1.1800 0.41900 986.00 1.1600 0.37000 992.00 1.1380 0.32500 998.00 1.1140 0.28500 1004.0 1.0890 0.25000 1010.0 1.0640 0.21900 1016.0 1.0330 0.19300 1022.0 1.0030 0.17100 1028.0 0.97200 0.15300 1034.0 0.94000 0.13800 1039.0 0.90500 0.12500 1042.0 0.88900 0.12000