I think the actual mounting of the gas drive sprocket is based on a 6 hole ISO universal measurement ... so, you would need to find a source for this, ( maybe kings sales and service . com ), or you would have to figure out a way to have your standard chinese sprocket cnc machined to fit ...If sprockets are interchangeable you could cut the center out of a old one for spacing,or any kind of round donuts to space it out,with longer bolts..............Curt
add: I think this vendor only offers a 44 tooth (gas drive) sprocket, which is included.
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