Pegasus rim (“R” rim) on normal S60

Hello people, short question: does the Pegasus rim fit in 8 x 18″ format with ET46 on the normal S60? For the normal S60, the Eudora rim is an option. Why does the Eudora rim, 8 x 18″ format, have an ET of 49? My current Orpheus has an ET of 43 (17″. According to my understanding, the Pegasus would have to fit with a tyre combination 235/40, 18″, right?! What do I have to consider when mounting the Pegasus? And: who sells graphite-colored Pegasus rims (only original Volvo Pegasus!)?? Thank you.