If you search for modded crosshairs here are some good links:
http://www.accesswave.ca/~seburges/
http://www.wootabulous.nl/download.php?list.5
I use them to, it's better then the standard ones. They are getting boring after some years.
HOW TO ADD THEM:
Copy the UTX. file to your ''UnrealTournament\Textures'' Folder and
replace the lines you'll find in the file readme after: [Botpack.ChallengeHUD]in the User.Ini (which you will find in the UnrealTournament\System
Folder)