Well, it's hard to know what you consider to be too expensive. I see a whole lot of this contemporary Moro stuff go pretty cheaply on eBay, unless, of course, some bidder gets it in his head that he is bidding on an actual antique.
You are right about GI bring backs, and because of that there are a lot of Moro weapons here in the USA. I bought my first kris in an antique mall not too far from you in Keene, NH. The seller didn't even know what it was and sold it pretty cheaply. These weapons also tend to show up at gun shows alot, also due to the US military connection. But if you are really interested in the contemporary kris and barong that are shown in most of the photos on this thread you can definitely find tons of them on eBay, probably cheaper than they are in these "antique" stores in the Philippines.