Ruth....here is a site that sells the manuals
http://www.sewconsult.com/kenmore_sewing_machine_manual_158_178series.htm
Kenmore sewing machine manual 158.178series
Also...Ruth, if you call Sears and give them the model number they will be able to help you order your feet for you....they've always been good about that with me in the past ...I own 4 SK machines and haven't had any trouble yet with parts/feet especially. The number for replacement parts is 1-800-366-7278