Group bars spanning staves

First, I apologize if this has already been addressed, but I can't find an answer.

I'm transcribing organ music, and need to stretch the alto notation (normally treble clef but occasionally descending to the bass) WITHOUT using an intermediate in-line F clef. That is, I want to specify (for example) a group of four barred semiquavers, of which one (with a down staff and on the treble stave) lies before the other three on the bass clef with up-staffs).

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In other short words: of a four-note semi-quaver group: a single semiquaver UP to the treble clef line and the other three DOWN to the bass clef line. Or some other variant thereof. But the need is for staffs to not be in the same direction within a group to avoid unnecessary short-term staff changes.
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I think that this is a normal organ notation convention, and hope that this has already been implemented (in a way that I have yet to discover), or in a future revision.

Best regards,

Greg