reinstating hidden staff

[Stan Sanderson]

I am setting a multiverse vocal piece with a piano intro and piano ending. I 
wish to “French” the score. I am using “\RemoveAllEmptyStaves” to save space, 
however I want the 5 measures of vocal rest to also be visible at the end to 
show the repetition. 

How can  I revert the “RemoveAllEmptyStaves” instruction to allow this or 
alternatively, how can removing empty staves be applied to the first stave(s) 
only? 

Thanks,

Stan