Welcome to CPF!
I'll just sum up your choices:
Fenix E0, $20 shipped -- 9+ hour runtime, can probably be modded to red by David at Fenix-Store.com
Arc AAA-P, $45 shipped -- 5+ hour runtime, you could ask MillerMods or someone else to put a red LED in it -- Arcflashlight.com
Peak Matterhorn, $50 shipped (I think) -- 5+ hour runtime, sold in 1- or 3-LED versions, can be bought with red LEDs -- PeakLEDsolutions.com
Photon Freedom, $15-20 shipped -- 12 or 120 hour advertised runtime, sold in various colors, including red -- Photonlight.com
Personally, I'd choose the Fenix E0 with a white LED as a nighttime light, or a Peak Matterhorn 3-LED with red LEDs. Single red LED output is not all that strong, generally.