or, don't use a wick.
There is an old edgar westbury article on using vaporising burners around (I only have a scan copy – PM if you want it.
I have a meths-fired verticle boiler I designed a vaporising burner for and got working on second attempt. It uses a small wick to preheat the burner by means of a spider above the flame Sorry I cant find any pictures, and then when hot all of the heat is from a 'donut' of 1mm vent holes. generates many times the flame area of 3*1/4" wicks on my first trial system.
I do have to support the draught while the whole thing heats up. given this only gets used in the shed, I tend to just warm up the flue with the torch for about 30 seconds which creates enough draught to support the flame – if I was to use indoors I would need a fan or some sort.