Sig has pretty much done the optic cut in all the 22x series legions now.You can get the Sig P229 as an SAO legion that is optic cut from the factory, and I believe you can get a 226 the same way. Of the guns you mentioned that would be my route.
That said you can also get them in DA/SA in legion model with optic cut.
P229 LEGION COMPACT
For those who demand the best, now we have something even better.www.sigsauer.com
Only down side is I believe they are cut for the Deltapoint Pro optic footprint.
All the new ones coming if I to my store are cut for optics.
As far as the plain Jane Nitron 22x not sure other than the M11A1’s are not which they shouldn’t be