Yes Ebay have had them for years Tyler ,only thing is the converter being under the carby means it will fit a generator / water pump but probably won't fit on a mower without modifications.
You can buy a LPG carby from LEHR that's lpg only.
The only problem with my mower is I have no governor so I just adjust the throttle with the rpm at 3300 and cut the grass but if the grass if really high the rpm drops a fair amount ,I was thinking of going to 8 hp or just fitting a SU type of carby with a vacuum controlled slide .I guess it wouldn't be too difficult to make a vacuum controlled fuel enrichment system so when vacuum drops a little extra lpg will supply the engine.
