Thank you for choosing SearsPartsDirect.com. I understand how important it is to be able to convert your gas range to liquid propane. I have included a link to our PartsDirect page where you can purchase the part you need to complete your repair. Just click the blue link below to be taken to the page.
LP Conversion Kit for Frigidaire Range Model # FFGF3019LBA
SAFETY NOTICE: Be sure to disconnect power and/or gas to the appliance before performing any repairs. If you are not comfortable with doing any voltage checks that might be recommended, please contact your local service provider for repairs. Be aware that there could be sharp edges inside the appliance that could cause cuts or other injuries to yourself or others.
If you do not feel confident repairing this problem yourself, then you can have it repaired at your home by a Sears technician. Here is a link for the website:
Sears Home Services
If you have further questions please let me know. Thanks for using SearsPartsDirect.com.