Welcome to the site !!
As far as i know , the only "bolt on" part that will fit (and even that requires drilling/modification) is the front fender , i know people have done some plastic upgrades , but it requires custom tabs and and brackets but no matter what ,they usually have to fabricate adapter brackets to make the bolt holes line up , since Honda has a habit of changing the location of brackets as well as how the subframe is completely different than the earlier years as is the airbox , i have seen early CR250's re-fitted with 15 panels , but nothing was "bolt on" without some well thought out brackets and even then , i think the only viable option as far as anything looking right , would be just the front fender and the Cycra Stadium Plate (which will still require a bracket to be made)
There is this , but its seriously spendy , and still don't know if it will bolt up to a 450
http://www.txrace.com/shop/tx-race-conv ... 2006-2007/