I have created a percussion score of 3 bata drums together using conga instruments for one player. This score is represented by up stems for left hand and down stems for the right hand. However, to ease certain passages I’m hoping to be able to combine these so that both hands are beamed together, up, as shown in the following example:
There’s probably not really a satisfactory way to fake this, no. You could create an overall grid with five lines closely spaced and then a gap, but it won’t look quite right because you won’t have clefs in the expected places, and you’ll only have a single set of rests.