[Nobody]

Some of the barrels can be ordered direct from GM.

 

[1ShotKill]

I have a 16" SS fluted sporter on my 77/22 and it is VERY accurate.

Would it be possible to buy the 77/22 barrel from GM and use the spacer?

 

[Dr Heckel]

Here you go, Green Mountain 20" .920 barrel, stainless or blued, fluted or non-fluted...all showing as in stock-
http://www.brownells.com/.aspx/pid=25216/Product/RUGER-reg-10-22-reg-REPLACEMENT-BARREL