Tigrinya Hymnal Suggestions, Anyone?

I got home from the Hymn Society convention in Birmingham only to discover that my church now (first meeting 7/18) has an Eritrean church plant meeting in the sanctuary Sunday afternoons. Assuming this is not a flash in the pan, this means among other things rethinking where we will hold our next Evergreen Hymn Sing, currently set for 10/24 at 2 pm in the sanctuary. But more immediately, it means I need to find out about Tigrinya (or Tigrigna, or Tigriña, same thing—the real name is ????) hymnals, if such exist. A Google search suggests nothing of the sort. I shouldn't really say "hymnals"; "hymn resources" is more like it, including webpages, sound files, etc.

Anybody hereabouts know anything about this? Many Eritreans are Christians; the Orthodox Church, using Ge'ez as its liturgical language, goes back at least to the time of the Council of Chalcedon (ca. 450). I assume that even the Orthodox have some indigenous religious songs, even if they are not sung in church, and I assume that the many Protestant and other non-Orthodox Eritrean Christians have songs (whether indigenous or borrowed/translated) that they do sing in church, but so far I have not located any information on this subject nor any references to where such songs might be found.

Any assistance or suggestions would be an improvement over the nothing I currently know.

Haruo