For making your own tweeter/mid spheres..I will be trying these ideas out very soon.
http://www.caraudio.com/forums/advanced-sql-spl-discussion/534484-tweeter-spheres-pics-examples.html
Improve Your Soundstage for $2 - Car Audio | DiyMobileAudio.com | Car Stereo Forum
http://www.caraudio.com/forums/advanced-sql-spl-discussion/534484-tweeter-spheres-pics-examples.html
Improve Your Soundstage for $2 - Car Audio | DiyMobileAudio.com | Car Stereo Forum