Help - I'm looking for a ball joint dust boot for my Boxster

[Stevestik]

Does anyone know where I can find a lower control are ball joint dust boot for the rear of a Boxster. Porsche requires you to purchase the entire ($ 400.00) lower control arm even if all you need is the $ 5.00 boot. It's the same part on a 996. I accidently cut the boot while replacing a wheel bearing. Any help would be greatly appreciated.

Thanks,
Steve