Hello:

Do you have any idea of where in the USA I might get gourds
of this gigantic variety, or where I might obtain seeds.

If you look at this link, in "The Telegraph", out of Calcutta, India

http://www.telegraphindia.com/...

you can see that they can get 20 to 30 inches in diameter.

I am interested in ethnic, musical instrument design, and these are
amazing gourds.

Thank you

I have zero experience growing this type of gourd but you might try here:
http://quarryfarmgourds.com/se...