Radio / TV station where Nirvana (may have) played

Notes: This is a general letter you can send to a Media (radio or TV) company. It can be hard to know to whom the letter should be addressed, but perhaps "Head of Archiving" might be a good possibility for a big corporation, or "Archives Department" or something along those lines.

  [Your address]
[Email/Tel #]

[Address of recipient]

Dear Sirs,

I am writing on behalf of an ongoing biographical/cultural project to research and catalogue the history of the American grunge band 'Nirvana'.

Since there are no official logs of events in the band's history, we aim to create our own databases on the internet. We consider ourselves to be creating an immensely valuable resource, documenting an era which is already the subject of serious academic research. All our findings are published and distributed free of charge on the internet, and are used by, among others, biographers and the former band ...

To further these aims I am writing to enquire whether your radio/television station [insert the name of the station] any Nirvana interview/performance (aired on your station on [insert date (if known)] at [insert time (if known)]). We would be delighted to hear recollections, setlists and whether a recording exists.

I would be extremely grateful if you could spare a moment to reply to me either by email or telephone.

Yours faithfully,
[sign the letter]
[your name]

Suggested changes: you could add the following words:
"If you are unable to answer my query, I would be grateful if you could pass it on to someone else in [name of the company] who might be able to help."