sew-classic sells a inexpensive metal foot that gets good reviews. My metal and plastic one came from april1930sshoppe, $18.95 with free shipping. I really like it - when I took a class at my LQS, the instructor liked it better than the ones they sell for straight shanks. I don't think they carry a slant, though they do have other slant feet. There is an original on ebay now for about $18.