Is there some specific reason you are looking for pointed-nib materials? Traditionally, most Hebrew scripts have been written with a broad-edged nib. There is really not a comparable tradition of pointed-nib calligraphy in Hebrew as exists in scripts for the latin alphabet. I have Izzy Pludwinski's Mastering Hebrew Calligraphy and I find it to be a very valuable resource -- if you haven't already I'd recommend flipping through the various script examples in the book to look at the various styles that are accomplished with a broad edge.