....also don't over react to replacing the leaked fork oil. It's like blood, a little bit of blood splattered or dripped can look like a major crime scene when in fact it likely isn't that much.
The OEM seals aren't that much dough in the event you're concerned about the exact size etc. If you don't have a seal puller a trip to Harbor Freight for $10 bux is a worthwhile investment as it can be a pain to get in there to remove them without pulling the tube.
Likely take you 30 minutes for the first one an ten minutes for the other.
'02 BMW R1150 GSA