Found these on Amazon: https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
Initially skeptical of their authenticity but seller assured me they're 100% genuine Motorcraft so pulled the trigger knowing Amazon would stand by me. This is what arrived:
Can't argue now!
With my usual dealer discount I pay just over $50 each, these come in at $25.57 each. Even though I don't have an immediate need for all 8 I couldn't and didn't pass on this sale. For that cost there's no reason to use anything aftermarket or "cheap".
Most likely this same seller has a similar deal for V10 owners---have to contact them to find out.
Best thing is these are compatible for all Ford Modular Motors--from '97 to '13.