I did some searching on the forums here and on Swollow's RTB archive and couldn't find anything. You'll likely need to make it yourself or ask someone to make it.
Oddly, I feel like I've seen an add-on like this before. Granted, my memory may be a bit muddled. If I'm correct in my thinking that something like this used to exist, it would be quite old by now and hence would likely be broken anyway.