Niall McEwan's Alltan Dubh site from Cape Breton has a good store of lyrics and midis
http://www.geocities.com/alltandubh/Clar.html

probably contemporary with "Dèan Cadalan Sàmhach" rather than "more contemporary" in the sense of modern
There is a Capercaillie site with lyrics for most of their songs, some of which are recent compositions, and you could also look for Runrig material on line

there's some Gaelic song midis at
Craig Cockburn's pages

and archive material with sound files at
Sgoil Eòlais na h-Alba and Pròiseact Thiriodh