Looking for fixed peak filter

[Lotus 7]

You might try a Google search for "Notch Filter Design". There are plenty of filter designs (and on-line calculators for parts values), both active and passive that can work. A "Twin-T" is one of the more common types. You may want to use an active design and make it slightly tunable in case your requirements change later.

[Jim Williams]

Get a copy of Don Lancaster's "Opamp Filter Cookbook".

Or, just patch in a parametric EQ.

[Ruairi]

Any competent tech could make this for you.

[RoadToNever]

Thanks, I'll look into those options.