Ah man, you won't like it, but you should probably look through the archives of the yahoo group ScanHi-End. There's been a huge amount of discussion of this Kami induced crazing of scanner drums over the last five+ years. No one has nailed down the cause (best theory is that the high evaporation rate of Kami causes thermal stress (shock) in the acrylic due to making the surface cold while the rest of the acrylic is at room temperature, which in turn causes micro-cracks to form, which multiply over time), and a fair number deny that Kami-crazing even happens. But a lot of people apparently have had this happen to them.
In Europe SDS (Germany) used to refurbish scanner drums; perhaps they still do. But it's not at all cheap. Perhaps your best bet is looking for a used drum in good shape. And use either SDS's Anti-Newton mounting fluid or the Lumina fluid from ScanScience, neither of which has been tagged on the 'net as causing any kind of crazing of scanner drums.
I've been using rebranded SDS products here (as Prazio in NA) for more than six years without a problem. I'm just sayin'...