Get a T-20 zoomie, put in these parts:
LED : CREE Red XP-E2 on 16mm MTN MCPCB
Driver (have RMM add 1 7135): http://www.mtnelectronics.com/index.php?route=product/product&path=67&product_id=241
If you want less modes, do this mod for 3 or 2 modes: Driver Question: Nanjg AK-47a/101-AK-A1
I can’t help on the headlamp, as I’ve never dealt with them
Hope that helps