posted 07-07-2015 12:13 PM ET (US)
Sorry for the double posting- the first posting subject line didn't update from an old posting I did two years ago.Contacting whaler was the right call. Here is the answer in case someone comes across this thread:
The anchor roller used on the 1996 20 Dauntless was produced by a company called Windline. Their vendor part# for this was R-353. From what I understand, they no longer produce this part, though. http://windline.com/
Boston Whaler did not offer anchors from the factory at this time, however, I believe a 9lbs Danforth should fit without issue (depending on your needs).
http://www.danforthanchors.com/standard.html
Whaler would have included a Southco adjustable latch with the optional anchor roller. Below is a link to the Southco website showing the original...
http://www.southco.com/en-us/a1/a1-11-702-40
So net of it -- a 9 lb danforth should fit and stow on the roller (need to figure out how), and it gets secured with this southco adjustable latch.