This is the one I use with my vintage low shank machines:
{
http://www.shop.sew-classic.com/Low-...ade-P60610.htm }
They also come in a narrower version for straight stitch only machines:
{
http://www.shop.sew-classic.com/Low-...e-SCFNN-24.htm }
I'll probably try that one next order I make.
Sew-Classic has quite a few different 1/4" feet. The person who told you that none could be had was giving you a bunch of nonsense.
Joe