you wont get one, any machine that you use upside down will all be 2 stroke, like chain saws strimmers hedge trimmers. as the oil must mix with the petrol to get around to the working parts at different angles, There is no problems with 2 stroke, you just mix the little bottle of mix into a can of petrol and shake it up , and then pour it into the tank of your strimmer, i have used them in parks for years,
h, June 2016