As you say, "Franglais - pah!"

I guess the thing is, it could be:

a) "sourcing" (for the 1st time, if you will), a term I've seen used in "French" (sic), but confused in the author's mind with "ressource", giving rise to this amalgam, where the author possibly just means "finding a (re)source".

b) "re-sourcing" (on a subsequent occasion); as I said, I've seen "sourcing" (used in a context of deciding who the electricity provider will be), so this could be "doing the sourcing again" but with the spelling again influenced by "ressource".

The trouble is, of course, that use of the "re-" prefix in French does not necessarily imply an action being repeated - racheter is an obvious example, and reprendre is also often used when there is no apparent repetition involved.

Hence, unless your context makes it crystal clear that a change of supplier is involved, I'd be quite careful...:-)

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Note added at 1 hr 50 mins (2005-12-08 13:59:39 GMT)
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Looking on google, I would judge the majority of entries (not including the German ones!) to be a typo for "resourcing" - i.e. the procurement of resources, whether this be for the first or a subsequent time. As such, I would be tempted (not having seen the rest of your text) to use "resource procurement" and leave the whole question open as to whether this is the first time, a change of supplier or whatever.