out of Australia you can get a whipps or a B&B bash plate, they are seriously strong, 4mm alloy units with stainless fixings, they are about 150 - 180 A$ - some people dont like the alloy plates because they accentuate the engine noise and rattle, but that can be fixed with some adhesive sponge rubber tabs when you fit it.
if its the 2000 (1999?) to 2008 frame, i think the HD polyethelyne plates from Hyde Racing would fit - if you dont like alloy ones.
and theres also the Berg Hardparts enduro bashplate, which is vented.
for me, I reckon theres nothing better than the alloy B&B basplate.
Azza.