Hi Rachael,
I’m not aware of anyone in the northeast that retrofits wire harps with these (I live in Vermont and own a Triplett) but maybe you could contact them and see if it would be feasable to ship your harp out to CA and have them installed. Their website is http://www.triplettharps.com.
If anybody else knows of a builder in our area that does this, I’d be curious to know too! I think most wire harp builders in this region tend to focus on the strictly historic, diatonic instruments – that’s why I went with Triplett’s out on the west coast.
Hope it works out well for you! Who built your harp, btw?