Source for a Modulator?

[d houlton x0710]

Ok, this isn't *exactly* efi related, but it is close enough that
some of you might be able to help so here goes.

I'm looking for a modulator like they use on ABS systems that can
apply hydraulic pressure to a brake.  The control system will be
a microcontroller of the PIC or 68hc12 variety.  Anybody ever run
into one of these?  Some place that has specs on them as well maybe?

Any other lists or groups more appropriate for this question?

thanks
--Dan
houlster at bigfoot.com