Found this Malaysian company on eBay. Some unique parts available. I'm not sure any of these would do any good, what so you guys think?

BMW E53 X5 4.4 (1999) Aftermarket Performance Parts / Accessories / Spare Part - Ultra Racing Product Catalog

BMW E53 x5 Ultra Racing Lower Rear Member Bar 2 Points 4 4 1999 | eBay

If those don't work then go to the products page and navigate to the E53 section.

Ultra Racing Product Catalog

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2002 X5 4.6is - Titanium Silver / Black Alcantara - Dinan Stage 2 - Bilstein/Eibach - Brembo BBK ----SOLD---
1993 318i - Brilliantrot / Tan - bone stock daily driver