KT88 Tube coil

To All,
          in the uk very few radio hams build their ownTXs and almost none use
valve TXs so you just can't get big transmitter tubes.  The biggest tubes I
can easily buy are the KT88 tetrode (70W) and the EL34 pentode (30W).  Are
their any tube coils designed for these or other audio tubes?
Thanks in advance

Nick Field