Front Strut Tower Bar

Hey, I own a 1999 Nissan Maxima SE. I ordered a Front Strut Tower Bar from Courtesy Nissan and the facorty nuts on the shock absorbers are domed at the top. These nuts will not fit under the end plate bolt on the tower bar. I believe I need the same nuts (22 mm) without the domed top. However I cannot find them anywhere. Any info would be greatly appreciated. Thanx :(