I've "personally" never had a problem with tea-lighting method, but this is because I don't use my fingers, nor a nail in the tealight(s) which will more likely than not dribble all over the place as the wax liquifies, I had an offcut of alloy sheet which slides perfectly under the tea-light completely whilst it is sitting getting the smoke started, pulls out a treat, no spillage, far more use per tea-light than previous.
Which reminds me, a dab of silicone as a guard at the back & front will support it far better for anyone going down this route in terms of overall stability either way.
sharpie marker guide trace around the light & alloy & a couple of dabs allowed to dry & slot in your tea-light,
..possibly only applicable to myself as I trip around & over "interested" hounds send to curse me.
will pop a picture up (pointlessly) with metal dimensions so you can go hawking around a machine shop or pashion something from a tin can with a dremel.
(no, your old fondue fuel holder will not suffice)