Looking for a cost-effective filter for fluorscence

[idkididk]

I'm having trouble finding cheap (<$100) and effective (90%+ transmission) optical filters for fluorescence, specifically band-passing around 530nm, as narrowly as possible .

Anyone have any suggestions?

 

[billy_joule]

Have you priced up using a high and low pass filter in series? I know nothing about optical filters but could be worth a look