In my opinion using mixture of dyes having absorption in two different wavelength (as required) can solve your problem. In this case either you will get two separate peak or a broad peak depending on the absorption spectra of separate dyes.

Try a dye mixture, although one needs to be careful about possible photochemistry for high light intensity. Please see my paper "Energy Transfer and Photodegradation of Perylene Red with DTTC and HITC Acceptor Dyes in PMMA" Dyes and Pigments 2008 77(1):92-97