Elna Supermatic 722010 Hook Drive Gear & another replacemnt part?

Elna Supermatic 722010 replacement of Hook Drive Gear (plastic). Where can I buy one and if it doesn't fit return it? The ones in the pictures looks wrong.

& the thing behind the Hook the screw behind the Hook the Slot is Messed up because person used the wrong screwdriver, so it must also be replaced. Don't know what the part is called or where to buy one.

Anyone know what the name of the part is? I think it might be the "RACE"???

Help!

I really want to fix it & it worth paying for it & disassembling the sewing machine to fix it. It's a real beauty.

& how can I fix it with a fix it manual online free?

Thanks.

Lisa
June 2011