So I'm doing a head rebuild on a XU9 DKZ, and I found a valve spring that was broken in the first coil. So I did get lucky some time ago I'd like to know where I can get some new valve springs, without resorting to 'performance' double valve springs (which seem in abundant supply). I found on the internet via some ebay ads such as: https://www.ebay.at/itm/GENUINE-PEUGEOT-CITROEN-XU-BENZIN-INKLUSIVE-TURBO-VENTILFEDER-095254-/361949281419?hash=item5445dbbc8b that part nr 095254 corresponds to an XU valve spring. But are all XU valve springs the same? Can anyone confirm that these will work in an XU9 DKZ?   Also, are there other, more readily available head springs that do not require head work? (to my understanding, they all do).