If you google with your machine's model number you can probably find one. I just did a Juki TL2000 open toe foot and found this:
http://www.thecolorfulworldofsewing....-Machines.html
Also isn't Juki and Tin Lizzie the same machine now? Maybe a Tin Lizzie open toe foot will fit. Can't you contact your dealer or where you bought the machine from?