Many years ago, the Pittsburgh Greek Catholic eparchy published a hard cover Holy Week service book with both English and Slavonic side by side. If memory serves me right, the lamentations were part of the book. You could check with the pastor of a nearby Ruthenian Byzantine parish to see if he has access to this book. You very well could find one tucked away in the cantor's Kliros or the choir loft. You could email the contact person at the website you mentioned as well as he has a lot of knowledge on this subject.