Plugin for to make a POST "sticky"???

[ataraxia]

Does anyone know of a plug-in for vB 3.51+ that will allow an admin to designate a post as "sticky" within its thread? (That is, the sticky post will always be displayed first regardless of how the thread display order is set? It's the same idea as a "sticky thread" except is applies to a post, instead.)

Having this ability would be absolutely marvelous for specifying topic, rules, procedures, requests or providing additional pertinent information or text, etc. at the individual thread level.

Thanks