If you found something that's very close, it would (probably) be easiest if you gave us a link to the one that's close, and then told us what you want in it that isn't there and/or what's in it that you don't want.
Most quote scripts are very simple, and most alterations are fairly simple to code, but without the details (and knowing that there's already one that's very close helps) there's not much else we can do.
