There hasn't been anyone supplying bulrush since H. H. Perkins lost their Portuguese supplier about 10 years ago or more. I used to harvest my own bulrush in northern Minnesota but now that I've moved to Wisconsin, I've lost that resource. Course, I guess I could make the four-hour one-way journey once a year, wouldn't be that bad!
The only alternatives would be to ask some of the basket guild members in Washington and Oregon if they have a source. Check on my Basket Guilds page. https://www.WickerWoman.com/links/basket-guilds
Other than that, I'm thinking of contacting English rush supplier Felicity Irons from Rush Matters and see what the import fees and total cost would be for a bolt. When I find out, I'll let you know.