Hi there Winzracing,
With your opening greeting in my home language, you've certainly got my attention ! Where in the world are you and how come you can speak the taal ? If I know in which country you live, I may be able to give you more specific detail of suppliers.
This is just my personal opinion, but I think the gas legs from Lawless in the USA are best ! Greg Morty in Australia also makes a gas leg. The Zenoah range of gas engines are available virtually anywhere in the world !
Till later,
Cheers,
Wennie.