To my surprise there are a number of new parts that fit the 45k.
I have modified the shuttle race off another machine and it is perfect. There is also a commercially available shuttle race ring that fits. Both are now listed on ebay along with needle plate screws, needle clamps, roller feet, NOS feed dogs and shuttles. By the end of January needle plates will be added to the range.
I can also get a rather ugly looking foot but have nothing except the sample yet.