Rear stabilizer bar bushings?

OK, I have done some searching and can't find anyone (inc. RockAuto) that sells bushings for the rear stabilizer bar (sway bar). Looked at GrandAm forum, too. Does anyone know where to get replacement bushings for 2000 Alero GLS with FE2 handling option (ride/handling; not Sport option)? Measured diameter of rear swaybar is 15mm.
Thanks in advance...

OK, it's called an "insulator", p/n 22619844, some GM dealership's online parts services carry it.... same as on Malibu's...