I am not an LEO, so I have never tried to buy a gun from Bud's via their LE division. However, having purchased 5 handguns from Bud's within the past 3 years, I can say that I have never had a problem with them insofar as their complete honesty and willingness to make me happy is concerned.
Many online retailers typically take orders for items that they do not carry in their inventory. They are drop shipped from the factory or distributor, and discrepancies in what the retailer shows as being available, and what is actually available from the factory/distributor, are not uncommon.
I seriously doubt that Bud's is intentionally trying to pull a "bait and switch" on you. Give them a chance to work it out before you get upset. I'm sure you'll both have a better day.