Hi Carrie, welcome to COPA!
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The very first thing to do is a borescope inspection, that is the best way to ascertain why the cylinder is not making power, and once that is determined, you can evaluate how best to proceed.
In many cases the cylinder can be repaired, at times without removal, however, these repairs are oftentimes not covered under warranty, the manufacturers instead prefer to replace the cylinder with a new or overhauled part.
Even in today’s world, 11 months to get a jug is beyond unreasonable, who provided you with that estimate?
Have you spoken directly to Cirrus Field Service?
Good luck!