Good gas burners, suitable for wok cooking (for proper stir-fry Chinese, Thai, Viet,…) are on special at Amazon
Standard version (RBC 176LP) is usually $160, now $132. Recommended wok size Min: 30cm Max: 45cm, 20 MJ/hour heat capacity.
Large version (RBC 225LP) is usually $180, now $149. Recommended wok size Min: 45cm Max: 50cm, 32 MJ/hour heat capacity.
Home-use woks are usually 12'' - 14'', so standard size should be fine.
These are for outdoor use - do not use it inside (smoke from seasoning will trigger the fire alarm, and oil in the wok can ignite easily if it gets too hot).
Works with the usual LPG bottles (4.5kg/9kg). Auto-ignition, 3-stage flame control. Comes with 1.2m hose and POL regulator.
Free delivery (even without Amazon Prime).
Note that this is the famous Rambo burner series, but it works on standard pressure LPG. There are larger mushroom burners (almost flame throwers:) reaching ~55-65 MJ/h or more, but they are more expensive and currently not on special. I reckon this might start a flame war (pun intended) but 20 MJ is enough for cooking for a few people in a standard-size wok, providing plenty of heat for good and quick searing and frying. Large burners on standard gas cooktops are usually ~ 3 KWh which is ~ 10 MJ (some high-end cooktops can go e.g. 5KWh ~ 18 MJ), so even gas burner with just 20 MJ/h is big improvement comparing to kitchen cooktops.
Rambo, First Stir Fry. lol