Stern Rail
You can apparently fit a stern rail from a C25, if you can find one Also Catalina Direct has a split stern rail for a C22, check out Chip Ford's website about adding the CD split rail, though, he thinks it is not a very strong setup and needs strengthening. There was a fellow parting out a couple C22's in Long Island, NY, on the gear section, as well as Craigslist, but the ad is now gone, you may want to try looking at Craigslist for New York city, going back a couple weeks, in case the ad is still there, but I don't know that he had a stern rail included in the first place. Look at Catalina Direct for sale section, there was a couple folks parting out C22 postings a while back, if you find an original C22 stern rail, and must get it shippped, have it done via Greyhound, I bought one in California last year and had it sent to New York for $50.