A live wire touched the case of my ABS control unit (ABS ECU), frying it.
I got a replacement from a salvage dealer, which worked fine, for £75.00 - nowhere near to $1200!!
It's a last resort though if you have no reason to believe its faulty. Have you tried an independant garage rather than replacing random parts? There are testers available that quite effectively identify whats working and whats not in your ABS.
Let us know what you get
2.5-16v 1990 90,000m Astral Silver
2.0E 8v 1986 107,000m Black