Truth crank mechanism

Thanks for reaching out! Your operators look a lot like our 39-032, its opposite is part 39-031. Carefully review the dimensions below to see if this is the correct fit. 

Dimensions for 39-032

These are compatible with the 39-107 cover and either the 39-114L or the 39-205 folding handle. There is also the option of the 39-107FK folding handle and cover kit. I've also linked some other hardware parts to this thread in case you are considering replacing those as well.