You won't find BMW part numbers for those. That's the seals that come in his kit when you buy it from him. BMW only sells full VANOS units, not individual seals, which is partly the reason he made the kit in the first place.
Some of those o-rings do have BMW part numbers associated to them (meaning you can buy them from BMW). Depends which ones you are referring to.
But as blackknight said the kit from Beisan are all made by him and are not from BMW.
I bought a kit from Beisan and installed all seals....it's a well made kit.