At the quoted shipping, I would call and ask if another means can be arranged less expensively. I suspect they will work with you. But it is my first choice, and I found no close seconds reliably. There are things like used GE 97F series which show up used for less, this is a good second choice. Either way, the 2 1/2 hole is required to surface mount them and it does not matter what you decide to put in the hole at a later date.
regards,
Douglas