No. You might only use non-RoHS parts for repair.
The date limit is valid for every *individual* gadget being sold. AFAIK this
means "sold to the final, private customer". Industrial customers might be able
to still buy and use non-RoHS devices. This is one of the details that are still
rather unclear, AFAIK.
But they (government) really don't care about the parts (or completely produced
gadgets) you (or any dealer) have on stock.
Does "this gadget" now refer to the product, or the single item ?
From what you tell, it is the product. N of it already sold,
M of it still on stock. Great. I would hate to have the remaining
stock thrown into the landfill.
But that exactly is what this stupid directive says. :-(
Makes no sense, but this is law meanwhile.
That's why the directive was published a few years ago, to allow the concerned
companies to switch to RoHS components and materials *before* July 2006.
However, problem is that many parts still are not available in a RoHS version,
and the soldering process is the last to turn lead-free (to avoid lead
contamination from the parts). This makes stock management a difficult thing today.
Yes, many details have to be discussed further...