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...... that's what I'd opt. for .
Sure you can get a new one but why , the old one is nice cause it's the "old one ". As already suggested , fill the area completely where the old bolts went through (I'd use epoxy and wood flour or other filler material (silca) in the epoxy to thicken it some) . If you can manage two bolts each side during reinstall , good idea , seal ends well and new bolt hole bores too (I know that's all been said but , can't over imphesize the importance).
Only reason I've posted is that I wanted to saY ... it would be a good idea to do the crack gluing 1st before the epoxy filling . You can use the area where the missing wood is around the old bolt hole to get a wedge into , allowing for some spreading of the crack to get the glue in better . As you spread the crack ever so slightly , you'll notice the crack trying to grow a bit , you might hear it too ... spread slowly with care so you can stop before it cracks too far ... then remove wedge and clamp lightly .
ps. ... very sharp point hardwood wedge is best , harder the wood the better .