I am looking for an add on flir type thermo optic. I currently run Nightforce and Steiner Military scopes with 56 mm objective. I am want to add some type of thermo to the front of these. What can a guy get that's decent and not over $5,000 what kind of option do I have. I don believe in buying good gear but don't have 10k to drop on this. Any help would be appreciated.