I found this smooth pulley that looks like it might fit in place of the grooved one.
ATTRIBUTES SPECIFICATIONS
No. of Bearings 1
Flange N
Bearing ID 1 (mm) 8
Pulley Material Polymer
Pulley Type Serpentine
Flat Y
Max Belt Width 06 Rib
Pulley Diameter (mm) 65
Pulley Width (mm) 25
89178
Here's a Uro pulley that's less expensive than the Dayco.