The fiche for the 99s show the same bearing top and bottom. We couldn't have gotten them in time from GoFasters had they had them, but the local bearing house came to the rescue and it sounds like Sean will be lining up at the National after all.
There's a testament to GG longevity - this guy is racing a 13 year-old motorcycle at the national level ... wouldn't be allowed in pro motocross (5 year limit).