I don't have the soundtrack... but I know you can get one using the SPC files of that game. Just look for Top Gear in the URL below.
http://www.zophar.net/zsnes/spc/
After that... get Winamp and the SPC plug-in "SNESAmp" for it. You can find both of these in the URL below.
http://www.zophar.net/winamp/
Once that's done... you just open the SPC files in Winamp. To actually record it... you'll have to change some settings to record them onto your hard drive.
I forgot the actual details... but you can find them in the URL below this paragraph. Hope this helps!
Thread 34303