No. A sample license agreement is only valid for the original master file from Tracklib. You can not use a recording from vinyl, CD or a track purchased at any other location than Tracklib and sample it from there. The reason is that the vinyl or CD release people have in their collection is often a different release than the one we have sample clearance for.
So you have to purchase it from Tracklib to license the track.
The tracks are high quality WAV files, and Tracklib has stems on certain songs that you can't find anywhere else. All tracks cost only 1.99 $/€/£.