Can I run my mains gas hob on bottled cng without changing jets?

I have a "Tecnogas Magic Flame" hob which is set up to run on mains gas. I cannot seem to locate conversion jets to run it on lpg. Have looked on net but cannot find anything listed I don't know if all lpg jets are the same for all hobs or not?
If they're not available could I still use my hob by using bottled CNG? without changing the jets? or is that a NO NO?

Richard
November 2009