Kevinski - Here's a Canadian source for the
Steering Box Seals (under SKF 11055 which is same as CR 11055) that may save you the shipping and associated fees to get one to you from this side of the border.
Otherwise, maybe look at
Rock Auto SKF 11055 as the least expensive US price I could find (only $5.23 USD +shipping, etc.).
The original GM# 7801626 looks to be still available from GM stocks, but your going to pay a bigger price from a dealer than most being offered on ebay and other vendors.