Feel your pain on that one – found the same bearing plate cracked when I was restoring my 1958 Johnson. Hard part to find at a reasonable price – new one is like $125. That part number has been replaced by #382796. Perhaps someone here in the club might have one in their boneyard or you might try:
Gano’s Outboard Parts http://www.ganotech.com/
Pine Lake Parts ebay store. https://www.ebay.com/str/pinelakepartsinc
You can also call Pine Lake Parts at 269-290-7317. I’ve often found it easier to call them direct with the part number you need – they have tons of stuff not listed on their ebay store.
Bob
1937 Champion D2C Deluxe Lite Twin
1954 Johnson CD-11
1957 Evinrude Fastwin 18
1958 Johnson QD-19
1958 Johnson FD-12
1959 Johnson QD-20
“Every 20 minute job is only a broken bolt away from a 3-day project.”
"Every time you remove a broken or seized bolt an angel gets his wings."