Check this out:http://www.sailboatdata.com/view_BUILDER.asp?Builder_ID=226
I think Calgan was Canadian company that built Cal boats under licsence from Jensen Marine, the US builder, as well a few of their own models. I think the founder, Al Nairne, knew Jack Jensen personally and was so impressed with the Cal boats that he got permission to built them himself. Many of the boats were 'similar' to Cal's but not the same. (a little shorter here, a little wider there, etc.).
The only reason I have not included any of the Calgan models is that I have not located any reliable documentation or specs for any particular model.
Does your boat have any simililarities to a particular Cal model? Do you have a picture or anything?
The last I heard is that this guy Al Nairne now lives somewhere in FLA.
I'll get back to you if I find any thing more.