Outdoor wok burner

Has anyone bought/used an outdoor gas wok burner ?
I've seen this & similar on ebay. Any comments ?

Or is there an alternative product out there that does a similar job?
Currently have a wok burner on my gas cooktop but so sick of the grime this type of cooking creates so want to move the cooking outside

I have used one .. not exactly the one you have shown, but something similar.
Bunnings sell a few but i think i got mine via gumtree a couple of years ago .. look it up theres a few selling ..

thanks I'll check out bunnings