I have a Bernina 830 record and this is a picture of the Bernina walking foot that I use with it. It's the old style (no notch at the back) and you put it on by sliding it on sideways and then turning forward (the space is tight). You will get them on eBay, there's a link here to one that sold recently. Also I've included a picture of the part number which is written on the back. For a stitch in the ditch foot your could use foot number 016, the blind stitch foot, that should have come with the accessory box for your machine. If not, they are available on eBay. Can't help you with the quarter inch foot as I don't think Bernina made one for that model and I don't know if the new versions will fit on the old style machine. It's something I plan to check out soon.
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http://www.ebay.co.uk/itm/BERNINA-WA...vip=true&rt=nc