Go to oregonproducts.com/lookups/powersearch.aspx and fill in the Scag number and info.
Click the Show Equivalent Oregon OEP Parts.
This will show all the Oregon blades available as possible replacements for a Scag 482881.
I use G5s on my 48" Tiger Cub with collection system.
When you decide which Oregon blade, do a google search to find the best price and lowest shipping cost.
I would cut and paste the Oregon page, but this computer won't let me.