By the way, I know there are canonical examples of noun-noun constructions with noun + adjectival verb, but are there any canonical examples with a noun-noun construction containing a noun + relative clause?

Yes.
romuluSngan Sambogh 'ej HoHbogh nejwI' Romulan hunter-killer probe (STK)
There are undoubtedly others.

That's a really good example. Thanks again!

Thinking about that example it just ocurred to me that such a structure could actually be ambiguous. I know it doesn't make much sense, but it *could* also mean *The probe of the Romulan who she / he will find and kill* or *The probe of the Romulans she / he / they will find and kill*. In phrases with this or similar structure, context or, if necessary, rephrasing would clarify which meaning is intended, am I right?

Yes, it's ambiguous, but it refers to a recognized device, so presumably anybody who understands what it is will also understand what you mean when you say it.

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SuStel
http://trimboli.name