This doesn't solve your problem but I'm in Canada and ordered mine on eBay from a seller in Hong Kong. They turned out to be good but I have heard there are bootlegs on eBay too. I could give you the name of the seller if you're interested.
http://www.vgp.ca/ is a Canadian website which sells Hori screen protectors but the downside is that they are for the DSLite so I haven't purchased them as I want to keep my Hot Rod Red so I'm not sure they'll fit.
They would probably fit, since the screens are supposed to be the same size. There must be some difference between the models but I bet they are still cross-compatible. Just an assumption. They're usually cheap enough to give it a shot.
Can't find any threads about this particular issue on GBAtemp or the wider intarwebz. Saw one video on YouTube that seemed relevant, but it was some dude with the same issue, no solutions offered in the comments. :/