Looks like these? Ebay has every part for sale:
https://www.ebay.com/itm/BMW-Genuine...ZZQuMN&vxp=mtr
possible part #
51137117240
Real oem is easy to look up parts. I took a stab on your model and year:
http://www.realoem.com/bmw/enUS/show...diagId=51_8497
---- Processing Individual ----
Z1XX Upholstery
Seats front and back in Epingle / leather englishgruen,
As Schl.Nr. B9EG.
Front seat backrest in Montana Englishgruen (No. 8 174 861)
Other interior equipment as for Volleder Nappa englischgruen,
Schl.Nr. P5EG
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