Good host to recommend for XM-L color?

I intend to build my first xm-l color flashlight. Any good host to recommend?

It has to fit 20mm star, compact size, decent looking and quality. Under $18 bucks if possible.

Convoy M1.

Haha, I actually has a spare with me. However, I prefer zoomable type as I want to have good flood beam and focus emitter view.