Have a quick look on ebay here in the Sates and these showed up.
https://www.ebay.com/itm/1999-HONDA-CBR900RR-CBR-900RR-FRONT-END-FORKS-TRIPLE-TREE-CLAMP-FORK-TUBES/292648320766?fits=Model%3ACBR900RR&hash=item442332fefe:g:DDUAAOSw65FbUiEO:rk:42:pf:0#shpCntId
Not the prettiest but looks serviceable. I would contact him to verify what he means by some damage, hopefully its the pitting on the top. He says he ships to many countries also. Regards, Michael