I don't understand why you would ask this question. I went to "Search" (very visible here on the forums), clicked on "Advanced Search" ...highlighted all of the ISXVG forums and then typed "harvest" in the search box.
This was the result:
http://www.isxgames.com/forums/search.php?searchid=153018
No one here is going to be sympathetic to ANY questions that can be easily answered yourself. If you don't see anything on the forums, then that means it doesn't exist. Asking if "there is one" is pointless. If it's here on the forums, it exists...if it isn't, it doesn't.
Then, if you don't find one, your next step should be download other scripts, see how everything works, study lavishscript, and create your own. All scripts provided here are the work of people like you ...they don't get paid or anything of that nature. So, asking for one is just going to irritate people as well (since they will think you should make it yourself.)
Part of using innerspace and ISXVG is learning to create and design your own scripts...not just use others. Yes, it will take you a few weeks of study and frustrating trial/error ...however, that's how everyone learned it. Contrary to mainstream American belief, nothing is free and nothing good is easy.