Crowdercref, you wrote "I'm always pleased to get suggestions/ideas/references from others working in the same or related areas."

I'm not sure exactly what you're asking, so at the risk of seeming obvious I will point out that there are Cornish groups around the world who might be interested in hearing about or funding your work. (Go to Google and enter "Cornish Society.")

I grew up in Wisconsin and was made aware that there were towns there with Cornish heritage. Cornish music might have been preserved in towns such as that.