There were a variety of Colt .22 Single Action revolvers, ranging from the aluminum or "Zamac" zinc framed Scout models to the color case hardened steel framed guns like the Peacemaker .22 and New Frontier .22.
As far as I can remember, the same size grips were used on all versions.
While you should contact Eagle for the last word, the steel framed Peacemaker and new Frontier .22's use the exact same grip both in design and size.