There's definitely room for variation even within the templates.
Adventurers offers some guidance for this on p.14 under
Customizing Professional Templates; Kromm gave us an entire article of customized pick-and-choose template pieces in
Pyramid 3/113 with
Five Easy Pieces.
For a "staffbuckler" specifically, using the Swashbuckler template as-is and swapping the weapon skill and Weapon Master for Quarterstaff is probably all you need to do. As staves are rarely expensive enough to justify a Weapon Bond I'd consider replacing that advantage as well (Trademark Move is an obvious choice).