Check out posts #24, #27, #28 for some simple DIY oarlock ideas...
Are those supposed to be links?
Are you referring to the rope grommets? Their function is to hold the oar to the pin, if that's what you mean.
Where do I find these posts? I'm a tad confused...
Ahhh! Now I get it, here's the link:
http://forum.woodenboat.com/showthread.php?140224-oarlock-choices-pros-cons...round-horn-quot-Douglas-quot-square-oval
I had an oarlock like this one: http://www.jamestowndistributors.com/userportal/woeimages/MarineSupplies/THE-2347.jpg
It worked very well for a 12' sculling oar on my CL Frisco Flyer....