Just tell the appraiser it came with LEDs from the factory..
actually, this works! ^^
friend who drives a 2008 C4S got lightly rear-ended by some tall suv/pick-up which busted the bumper and left rear tail light, both of which were retrofits from a newer 2010 rear bumper with 2010 rear LED lights. He told the adjuster that they were dealer-installed pre-delivery options and they just paid whatever the difference was to have the repair shop order 2010 oem parts to retrofit into a 2008 car. No issues.
So if anyone smashes up their Golf's rear and their Golf R LED installs, just use the same story. They don't seem to ever check validity with the dealer, and even if they did, the dealer will verify your claim regardless by vaguely replying "he's a customer" or something like that. The "aftermarket" oem parts don't really cost much more if at all, so the adjuster could give a sh1t if it means making you more compliant to agreement and the claim being closed.
Summary: Just get 'em. Although euro only for now, they're still a factory part, and shall be replaced as such, one way or another, without any additional expense to you.