Bore weld a cast excavator boom end

What is the most best way to repair worn out pin bosses made of cast something or other on the far end of an Ex 200-5 boom . My dipper has been getting wigglier year on year but and I had it on my to do list but now it has cracked outside the locating pin holes .
I asked on the forum before about expander pins and the responses were mostly negative .
Can I bore ,weld and rebore ?
I dont think there is enough material to bore and sleeve .
Should I fabricate a complete new boom end in steel...

Bore weld a cast excavator boom end

Bore weld a cast excavator boom end