Empty drop-ins
Here are a few empty P60 drop-ins for making your own drop-ins.
Small hole for XP-E and possibly XP-G LEDs: KD. Has OP reflector. Can be drilled out a little if you want to give an XP-G a little more room.
Bigger hole (7mm) for XR-E and XM-L LEDs with a smooth reflector KD, KD and DX
Bigger hole with OP reflector: KD, KD (more expensive, supposedly made for MC-E)