Bard item for + Inspire Courage

[SadisticFishing]

What's it called?

[SCPRedMage]

Well, there's the Badge of Valor from Magic Item Compendium, page 208, which can either give allies a +2 against charm/fear saves OR +1 to Inspire courage, 3/day. It's part of a magic item set called the Regalia of the Hero.

[Terraspaz]

Does this by chance stack with the bonus granted by "Inspirational Boost"?

[Kurobara]

Also, the Vest of Legends (DMGII) makes you count as 5 levels higher foe the bonuses from those bardic musics that scale with level (e.g. inspire courage's bonus and the number of targets for inspire competence), along with some skill bonuses.

[Townopolis]

Does this by chance stack with the bonus granted by "Inspirational Boost"?
It's an untyped bonus, so yes. Also, since it's an immediate action to use the badge, you can use it in the same round as the spell. You may or may not have to wait until it's actually the next person's turn, I don't know for certain.

[Ascension]

Also, the masterwork instruments in Complete Adventurer modify the bardic music abilities. Several of them either enhance or alter the effects of Inspire Courage.