The Church of Latter-Day Saint (LDS church) keeps Family Search centres at their churches. Apparently, they have access to a huge number of genealogical records from around the world on microfilm, including a massive collection of Latvian records. I guess you can order these microfilms to your nearest search centre and access them. I haven’t tried this yet and am not sure when I will have time to do so, but perhaps it is a future path for me to follow.
https://www.familysearch.org/locations
A Latvian Canadian Story
Tracing my Latvian roots back as far as I can, telling stories along the way
