Answer: On the Monrovia website there is an option to search for retailers using your zip code. If you know the zips for Shreveport and Longview, you can enter those as well. This will generate a list of local nurseries. We at the Q & A forum do not have information as to which nurseries carry which plants, so with your list of local retailers, you can phone or email to see if they have the gardenia in stock.
Wish I could offer more assistance. Best wishes with your new plants!
Q&A Library Searching Tips