I've thought further about this idea, and maybe it would be better to have a rest of the world test team. Whether Zimbabwe would be allowed to be part of such a team remains to be seen, but if they weren't, then it could look something like:
. William Porterfield - IRE
. Eric Schwartzynski - NET
. Steve Tikolo - KEN
. Ryan ten Doeschate - NET
. Niall O'Brien - IRE
. Kyle O'Brien - IRE
. Ant Botha - IRE
. Thomas Odoyo - KEN
. Chris Wright - SCO
. Khurram Chohan - CAN
. Boyd Rankin - IRE
But it would need a spinner.