sleeve

i am building a motor and need a block. where can i get one? and which engines if i was to buy a complete engine come like this from the factory.

I was looking for a sleeve for the Cherry throttle on my Bonanza 1300. I have come to the conclusion that I will not find a sleeve for the Cherry throttle. I did find a 1" throttle that looks like a good replacement for the Cherry throttle. I like the price at $10.50 and since I should buy...