The version by Georges Brassens (recorded much later than 1938) is from his album where he sings songs of his youth (available on Amazon).
This link is to a version posted on mySpace. Here is a link to a version by Trénet himself posted on this site from Québec. Scroll down to get to J'ai connu de vous... You can also buy via Amazon. The song is part of an excellent CD that contains most of the best songs of Charles Trénet. Highly recommended. It is also a good deal $ wise (at $14) as it would cost about $30 more to buy each song separately.
Lyrics