Try google.

There are a few good sites out there, but I tend to like www.allbrands.com I've only purchased 1 or 2 items from them but I haven't had any problems.

www.allbrands.com/productsearch.php

www.allbrands.com/products/abc0094.html

good luck

there are a number of websites that specializing in scans of old sewing machine manuals, or there are other sites which sell them. try googling the model and make and I'd be very surprised if you didn't find a manual online somewhere.

As for the feet, it will depend on the shank length (and angle) of the bar that the feet go onto. Fortunately, these are rather standardized. You're welcome to bring your machine over and you can see if the feet I have fit. That should help give you an idea of what you're looking for. I might even have some extras lying around, but I'm not sure.

I have a sewing machine repair guy who might be able to order some parts for you if you need something weird, but often you can find feet in sewing machine stores, especially if it takes standard feet.