E21 seat belt receiver

[NiagaraE21]

Does anyone know what the part number is for a late model e21 seat belt receiver? I can't even figure out what name they're going by for it, let alone find a place to buy one. I thought it was 72111900527 but it's not. Appreciate any help!

 

[zippy320]

It does seem to be the correct number for the part that the seat belt plugs into .

There is also 01 SAFETY BELT FRONT LEFT 1 09/1978 09/1980 72111868917 This one ?

Have a look at this

http://www.realoem.com/bmw/enUS/sho..._1977_E21_BMW_320i&diagId=72_0038#72111900527