You might want to consider rebuilding your cylinders.
A lot of the time they are still in great shape, just needing a freshening up.
When you have the engine pulled down, check them out and get a quote.
I have an O-470 with at least one .015" (fifteen thou) overbored cylinder.
It runs fine. That cylinder must have thousands of hours on it, if it made any normal number of hours between overhauls, and an initial overbore to .005 on the second overhaul etc. etc.
Those cylinders you have aren't just used, they are also 'proofed'. After all, they made it this far, right?
Also, exchange cylinders are a choice. There is a whole industry involved in reconditioning parts, and you plan to recondition your cases and crank right??