Sorry to hear about your wife's lens, Dave
In this situation, I think you might be better off selling the lens - with full disclosure of the damage, of course - for spares or repair. You might be surprised how much you get for it. Then, put that money towards a new D FA 100mm f/2.8 Macro WR - or wait for a good FA 100 to appear on eBay. The newer D FA, whilst missing the focus limiter, is beautifully constructed and a lovely lens to use.
It's difficult to let go of a lens when you've grown attached to it, but I think this approach will present the least hassle, and might even be cheaper if you time your purchase of the new lens to coincide with discounts.