I don't see a reason why the C22 couldn't have a mini bowsprit to support a larger roller.
With a large plate made to bolt to the top of the bow and a support down to the hull it would probably be strong enough.
JudyB has a custom one, on her Catalina 27 for a spinnaker.
http://www.blumhorst.com/catalina27/bowsprit.htm
No need to change the rig, if it's just for an anchor.
On Judy's boat, the upper plate would be the same as putting a plate under the existing one on the C22.
That's said, I'm guessing that you'd probably have to make the hull plate large enough to spread load under the pulpit, so that it can handle the loads of a storm at anchor.
With a large plate made to bolt to the top of the bow and a support down to the hull it would probably be strong enough.
JudyB has a custom one, on her Catalina 27 for a spinnaker.
http://www.blumhorst.com/catalina27/bowsprit.htm
No need to change the rig, if it's just for an anchor.
On Judy's boat, the upper plate would be the same as putting a plate under the existing one on the C22.
That's said, I'm guessing that you'd probably have to make the hull plate large enough to spread load under the pulpit, so that it can handle the loads of a storm at anchor.