Well.. The Walker seems to be very thin (about 1.5 mm) and will not work
I found Felpro 60512 seems to work best.
For anyone interested the sizes are
ID: 62 mm (2.4 inches)
OD: 78 mm (3.0 inches)
Thickness: 5 mm
Price at Advance auto parts $5
Walker Quiet Flow SS 54681 Fail 2 by wjamyers, on Flickr
Walker Quiet Flow SS 54681 Fail 1 by wjamyers, on Flickr