Help with piston liners

Actually I have made several tools from pictures. but with this one, I would need a very thick piece of rubber, 5 inch in diameter.

 

Would love to find a Mechanic in the Indiana area that would come out and remove the liners for me if he's got the tool.

 

I could use a regular liner puller if the pistons would come out first but the pistons rod caps are quite larger than the liner.
Got two liners out so far using a bottle jack and letting sit for several hours under pressue.
Leaving the 3rd to sit over night. Good thing I have plenty of time.

 

Actually thought of this a few days ago, but couldn't find any where store local to try it out and not real sure about it working because with the piston having to come out with the liner makes so the piston is in the most up position and while trying to push up which leaves no place to for the dry ice to work. I hope I stated that understandable.
Unless I sprayed into the cylinder, set up underneath real quick with bottle jack but I'm not close to being that fast.
Though I do appreciate the thought and any more you might come up with.

 

3rd liner did come out today with tremoudous upward pressure from bottle jack and with a startling pow. No damage to my knowledge and this liner looks good like the others have.
I'm actually hoping to find a cracked liner since the machine shop stated the head had no cracks and not warped.
I'd hate to put this back together without finding the problem.

 

Got all the liners out and all look good. Going to have machine shop magnaflux them to look for leaks, though plan on replacing them, just want to find the problem before putting back together.