Have you looked at the fastlane store under the "Buy parts" link above? You can buy a meter of spark plug wire and an end, just replace the wire that you broke off for only a few bucks. IMO the M103 isn't that expensive an engine to work on, nor is it that complicated (aside from CIS-E system)

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth