I assume we're talking about tapered double irons? I have an extra Moulson iron (see pic). It's a little funky--you can see the left left side curves in a little--almost looks like someone ground a little away. But the bottom inch and a quarter or so is about 2.475 wide. You can also see that it has a nut and screw, instead of a threaded hole in the chipbreaker (the nut would've been spot welded on, but must've broke free at some point). It works, but you have to have a slot in the wedge. Of course, if you already have a chipbreaker, you can probably use it.
Anyway,as you can see, it's no prom queen, but if you want it, PM me--I won't charge you, except for shipping cost.