Turn a small drill press into a Bore/ Hone. Bolt it to the top of your engine block & do your own machining .

Thats a really high quality mag drill.....You'd laugh if you saw mine, it does work for what I need it for though
I just remember these drills being so expensive
Honestly these are very good quality but ours have had LOTS of use. I think I payed in the range of $2000-$3000 depending on size. They all have payed for themselves many times over.