Let us know who this recommended shirt maker is. The only shirtmaker here in L.A. that I feel can deliver to Freddy's level of workmanship or better is Anto, and their shirts cost a good deal more than Freddy's. We had it good price wise.
A Navy blazer would never go wrong in this situation but as you said, a touch boring. Maybe you can help your spouse find a nice sports coat instead. One that has a little life but not too garish and maybe pair it with a nice cotton/linen blend shirt.