That definitely sucks for sure. I hope they get back with you quickly with a reasonable solution.
However with that being said (worst case scenario); There is no way in hell that I would let 5 or 6 relatively simple holes put my project off for 6 months.
If you don't already have them, then I would get a set of transfer punches to mark the centers, and an protractor/angle gauge, and drill them myself.
Just turn it it the correct angle, drop the correct transfer punch down the hole, smack it with hammer.......Rinse and repeat for the other angles. Then pull that "pivot bolt" and drill'em.
Hell, I might even turn "lemons into lemonade" and make this the excuse/reason for a Mag-Drill......
https://www.amazon.com/Transfer-Punches/b?node=2225060011
And before anyone says "Well he shouldn't have to....blah...blah...blah" ....I wholeheartedly agree.