Here is a modified and now authentic digit set for my DAKTRONICS shot clocks. The top image is a screenshot of my clock with real DAKTRONICS clock images pasted below it. Compare the numbers to mine and you'll see they are an exact match except for the height and width because of the digit sizes in the 2K .dds file. This is about as authentic as I can get them.
Both shot clocks and digit sets are located in the archive at Moddingway. The download link is below the images. Simply import them into the stadiums of your choice.
Download At Moddingway
I have recorded a tutorial on how to import my shot clocks into your stadium(s) of choice. I'm not embedding it here because it needs to be viewed on YouTube in the expanded player at 480p for the best quality video. Simply click the image below to be forwarded to YouTube.