helipilot77, I am very sorry to read about your issues.
It's always painful to read about the unsuccessful struggles to fix a problem.
I've heard and read about what can repair a cracked block, including epoxy.
However, based upon my experiences with welding (mig and stick) and using an epoxy product for something other than an engine block,
unless there were serious issues with getting a replacement block, I'd would opt for a replacement block.
For me (I'm a long way from being an engine builder) rebuilding an engine once is a challenging, expensive, time-consuming,
and usually somewhat frustrating. BUT having to pull it and rebuild it again sucks like a big giant Hoover!!
Gnarls.
