Ken,
The front plate is tough to find but findable. MY1014 industrial needle works well as a replacement for obsolete original and is recommended by many. Make sure your machine has enough bobbins for you as these are very scarce though I heard someone say they used featherweight bobbins with success though I've never tried them. I've seen machines heads sell for $20 and up on ebay plus shipping and demand seems light. Craigslist seems to bring around $100 or so with treadle in my area (NJ) and they arn't all that common here. How much you pay will depend on looks and luck. Around here and I suspect most places it's a buyers market.
Happy hunting
Jon