As far as I can find,, no,, no steel ones by Ruger. I've heard of AMT possibily making steel recievers several years ago,, but I've never seen one. Plus,, there was a special order from Ruger for a model KB10/22-RPF by Williams Shooter Supply with a "White" finished reciever according to the RENE guide. Serial number range 255-00741- 255-745, with a possibility of 2000 produced.
Now,, the 10/22 magnum has a steel reciever,,!
AMT (Covina) made the Lightning Rifle in 22LR with a stainless steel receiver, medium weight 22" barrel (mine has no sights) and fire control housing. An excellent unit and a near-carbon copy of the Ruger, mine has given great service and many, many critters since the late 80s.
I believe they sold a 22WRFM version also named the Hunter, but I now they did sell a different (non-10/22 design) all-stainless rifle by the name of Magnum Hunter. It has a more tubular-design receiver.
Ruger actually did manufacture a handful of stainless receivers for the 10/22. A few have been reported of having been "removed" from the factory but the rest are there still. The 10/22M receivers were steel.