If you visit my temp website at:
www.Farmersgcl.com and click on the download tab you will find a couple files I posted earlier.
Scroll down to the 2nd one at the bottom - the legue graphics file.
If you download this file into a temp folder and then unzip it into another temp folder you will find about 45 parks - citizens & Petco included.
You can drag them into your graphics folder and make your own settings to them using the "edit ballpark" feature in the League Setup Menu.
Hope this helps.
Spanky