Looked. But...not all characters shown :(
Yes, on the preview, not all characters are shown, but most of the fonts that can be found with the link I gave you actually have the Lithuanian characters you're looking for. You should download one and try
Lithuanian a dit ... a) is close to authentic mediaeval ...
What do you consider "authentic mediaeval"?
Lithuanian have a look at Gilles le Corre's 1475 Bastarde Manual:
http://www.myfonts.com/fonts/glc/1475-bastarde-manual/
I am not sure but I think your Lithuanian characters are there. Hope this helps a bit.
Fuseau horaire : CEST. Il est actuellement 12:58