Im still looking for someone to create this simple mapaddon ;)
You can't just post a request and assume that everyone will bend over backward to make it happen. If someone wants to do it, someone will do it; otherwise, you can make it yourself or use one of the addons that already does this. Curse has an entire category dedicated to map addons: here.
Might be fun to do something over the top like making an addon that snoops guild position addon traffic in both directions (sent and received) and sends the data in whichever formats it doesn't see being reported. It would be an ugly solution because it would triple (or more) position related addon traffic, but it would get around having to beg other addon authors to add functionality to their stuff.