Sew-Classic has 4 1/4" feet with guides. {
http://www.shop.sew-classic.com/Low-Shank-Feet_c5.htm }.
They are not hard to find.
There is also several different shapes of fabric guides and some of them have notches where the needle plate screw heads are. Matter of fact you could take a file and make a small notch on the one you have so the fabric wouldn't get under it.
Joe