Petsmart has a few mto choose from:
http://www.petsmart.com/global/searc...ch_results.jsp
Comfort Ride Travelin' Dog Car Harness
from $19.99
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Easy Rider Car Harness
from $9.99
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Pet Car Seat and Harness
$45.99
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PetBuckle Travel Harness
$24.99
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Greentrees' Top Royal Escort - DYLAN HIC, CGN, CD, FDN
Texanda's Montrose - MONTROSE (aka Monty) HIC