extending tempo

[E Appeldoorn]

I'm looking for a way to further extend the tempo mark
I know about the simple version

 \relative c'' {
  \tempo \markup {
    \concat {
      \bold "Andante appasionata "
      "("
      \lower #-0.5 \note {4} #UP
      " ("
      \lower #-0.5 \note {4.} #UP
      ") = 42)"
    }
  }
  a1

Now this is what I need the tempo to look like

With Swing 2=80 (  two beamed eights = \tuplet 3/2 { 4 2 } )

So how do I create the beamed eights and then create the tuplet (with 
tupletbeam -3-)
Thanks for your generous help.

vriendelijke groet, Erik Appeldoorn