Special ping function requested

Hi
I’m facing the problem that whenever I have several posts being published in a very short interval the WP ping function or even the Smart Update Pinger plugin will send multiple pings within the same minute. I would like to avoid this, either by controlling through the cron when to send one single ping, no matter how many posts have been published, or by blocking any subsequent pings within a specific time period, e.g. for the next 2 hours or so.

Is there any plugin out there that does this? I’m willing to discuss development costs if someone wants to give it a try.
Thanks