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