Made a bunch of copies of the front and rear sway bar kits that are now for sale. Contact me at aaron@ using the above domain name (limitedslip.net).
These are the rear reinforcement kit, E24RSB001:
These are the front replacement kit, E24FSB001:
Should work with an E24 or E28. Some earlier 533i and possible 633 Csi use a different rear sway bar mounting, and these won't work with that. If your bracket looks different than this one, the rear part won't work: