Currently there isnt a module that I am aware of to do it.
Bear in mind Anope will NOT know any other BotServ bots are in the channel, so if when the last non BotServ user leavese the channel, the channel is invite only, the second BotServ bot would remain keeping the channel existant, where as Anope would think it doesnt exist. SO when you then come to use "/msg ChanServ invite #channel" ChanServ will reply saying the channel doesnt exist.
Not to mention there is no valid need to have more then one BotServ bot in a channel.