This was the one i had gotten.
Albeit, at the time, it was 22.80. Basically just look for 30mm internal threads. Pitch is extra extra fine, i believe thats 1.5mm.
If you can find the right nut locally, just fab one up. Get some tube/pipe, weld it on one end of the nut, weld a smaller nut on the other end, throw a bolt in, and youre done.