I have one.
The headlight you might be able to find on ebay. Bearings are standard size.
I have the 653-2 model. It has a 4hp techumseh with the lighting coil.
Let me know if you have any more questions, and welcome to the group. :)
Check the photos under the following:
I posted some pictures showing the brackets. There are actually 2 (they share a common bolt) but I am sure that you can fab one from one piece of metal. Note that there are weld nuts as well. Hope this helps.