custos at end of piece!

[Andreas Stenberg]

Hi!

Is there any easy  way in version 2.18.2 to get a custos at the end of 
the (visible) notation in mensural or petrucci voice context?
Without twidling with forcing linebreak & hiding staff & notes & other 
objects. That is; having to manufacture a fucking lot of code
to add a rather small sign at end of the last line.

I am curently working on an edition of some rounds/ canons by Th. 
Ravenscroft.
Each round/ canon will be given in a) mensural (petrucci voice context) 
notation, b) a modern transcript with dashed barlines and
c) a resolution score with parts to help the singers see where they are 
(should be) in relation to other voices.

In the mensural rendering I would like to replicate a feature of the 
original print:

At the end of each round the original print gives a snippet with the 
begining notes + words and the words "ut supra"  =  as above.
This snipet  ends with  a custos showing the note that should follow if 
the snippet is read as the first few notes of the piece.

Yours sincerely

Andreas Stenberg