I don't pretend to be an authority on this, bur I do think that I have all of the recordings that Wade identified. Unfortunately, There are not many record stores left anywhere, including SW Louisiana. On-line though, There are some pretty good places to find Cajun recordings, particularly the ones that Wade identified.
Some of the best that I have used are ebay, half.com, amazon.com, and CDbaby.
Some are also available from countysales,com. Although i haven't looked at Elderly Instruments for a while, they used to have a good selection of good Cajun recordings. I have not used the website for Louisiana Music factory inNew Orleans, but I think that they are still there.
The key to finding them is to use the best phrases for your search. Try thing like Cajun, Cajun compilation, the label (JSP, Proper, Swallow, etc., in particular for the compilations. For specific artists, just use the artist's name. Ebay definitely has a lot of the compilations.
Just use information from Wade's listings and find the best terms to use in your searches. You will find a lot of the recordings. If you need more suggestions, just let me know; and I'll try to help.
Using the computer is definitely not as interesting as going to a good record store, but there just are not many of them around any more.
I'm not an authority either of course, but I receive regular mails of
flattownmusic.com aka Floyd's Record Shop
See link#2
I saw Bryan there back in 2011 when the shop was still open
Also vynil, but many 45 rpm records