There is not a workaround, but the situation you described is being addressed and corrected.
The following TurboTax help article includes a link where you can sign up with your email address to be notified when everything has been corrected. The article specifically mentions the Czech Republic as the country that is not shown in the list, but others are being addressed as well.
The option to select "other" is now available. You can revisit the foreign housing exclusion section to finish your return.
The link provided is now dead, and the issue also applies to Cyprus. There's not much time left...
Yes, the link is no longer applicable since the experience has been updated. If the country in which you resided is not on the list in the housing exclusion boxes select "Other" in the "M-Z" dropdown box.