Diviyen Mistry

So after recently getting hold of a second car, as above, I have taken a look to find out what the problem is. It had to be the cursed oil pump problem due to an poorly engineered balancer shaft. Now the engine has done approx 202k miles which his a heck of a lot so I’m contemplating an engine swap for the machine.

Now here is my questions to you all.

What engines fit?
What engine would you use and why?

In essence, I want to know what my options are.. bar the obvious replace the oil pump balance shaft or do the oil pump delete.