I got my osram from rs-components from my country, you can go to the rs component from your country (if it has one) and search for “GW CSSRM1.CC-MQMS-5L7N-1”, I see there are options for 2700k, 4000k, 5700k as well, for mine they sell in packs of 5, you’ll need to reflow them yourself, it fits on a XPG-sized star, but bear in mind they are slightly smaller then the XPG so there will be a small 5-10% gap
See this excellent review from djozz : New Osram Oslon Square, testing a 4000K 92CRI typ. emitter