It's been quite a while, but I would think any Speed Equipment Shop (possibly on line, Jegs or the like?) should be able to get you a new Hurst clips & bushing kit.
Just googled Hurst Steel Shifter Bushings and thie was one of the hits
http://cgi.ebay.com/ebaymotors/Hurst-steel-shifter-bushings-clips-racing-application_W0QQitemZ190321971340QQcmdZViewItemQQimsxZ20090717?IMSfp=TL0907171410001r37063