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I get on well with Arashi discs, which come from China as it happens but most of the Japanese manufacturers use them and they are at least half the price of any others I have seen. No idea if they make discs for the 1200 though.
Have you actually measured the run out on the disc(s) with a dial gauge?
It's quite possible that they are not warped at all but merely "surface conditioned".
It's possible to re-condition discs with this affliction by applying long hard-ish braking.
I imagine you have read this elsewhere on here, but basically all you do is get up to a good lick on a nice empty straight road and then brake firmly, keeping an even pressure on the lever for as long as possible and then easing it off before coming to a halt.. Repeat as necessary.
Unfortunately if there is a warp the heat generated by this process is probably going to make it worse, so best to check with a dial gauge first.
I have also heard that most "warped" discs are in fact actually warped carriers, which apparently is fixable. I have no personal experience of that.
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