They make hundreds upon hundreds of 2 cycles. Then again they probably make a thousand different plugs. My weedeater plug won't fit my 2 cycle bike engine.
I can't find the NGK B6HS, so I crossed to Autolite 4093.............Will this work ok on Skyhawk 48cc 2/stroke? Head is just a wee-bit longer........Gap is 0.28
Try the NGK BP6HS: it's the projector nose verion of the B6HS.
Also check out this cross reference chart for common sparkplugs that will fit Happy Time style engines.
This chart list "non resistor" spark plugs, although SickBikeParts stocks the NGK platinium variant in the resistor series.