bmw part numbers

Hi

I have a broken lever in the passenger seat of my 93 e36 320i.
I have asked for a new lever to my local bmw dealer.
He said that lever is no avaliable because has been replaced by a new one.

Anybody knows something about it?
Anybody knows any website to find bmw part numbers?

Regards
Alf:) ;) ;)

THE PART NUMBER FOR THE LEVER SHOULD BE ON THE LEVER. THERE SHOULD BE A 7 NUMBER, LIKE 12 34 567.