KitchenAid 38 in. KGCS166GSS Gas Cooktop "rubber feet grates" Questions

...THE GRATES missing rubber pads I just bought a 16 pack of the WB02T10461 GE replacement feet on ebay for $13 (free shipping). We'll see if they fit, but the pic indicates they should be an good

Also need black rubber feet for GE cooktop grill. Any help would be most appreciated! They are available at www.helpfulparts.com. Referred to as GE Gas Range Cooktop Grate Foot Pad, $1.73 each

...rubber "feet", they slide all over the cooktop surface and the downdraft grate has actually fallen into the filter area several times. Thanks in advance for your knowledge! Tim i bought mine new from ...