The collector plate is what removes the spherical aberration, so plain glass will be terrible, I'm not aware of any correcting lenses available.
Celestron would do the C11 replacement for somewhere in the $300 to $400 range, I assume Meade would be similar but the bankruptcy, whether liquidation or reorganization, would put you at financial risk of losing both money and telescope. plus, I believe you have to eat the shipping both ways.
Correctors are not readily swappable, however, it has been done fairly, to barely, successfully. There is a fair likelihood of an optical mismatch since they are supposedly matched for 'power'.
Sadly, I have heard and personally had nothing but issues with UPS, I would never use them to ship even a brick (despite their delivery personnel being absolutely lovely most of the time; the damage is done before it gets on the truck I assume). I would expect the brick to arrive chipped or broken.
They are sadly notorious for denying claims, however, it is my understanding that if it is packed by a UPS store that someone, whether the UPS or the store itself, will honor the claim eventually.
I agree with the prior post, that if the claim is not honored , you will likely look towards the seller to have your money refunded, but that will certainly depend on the cellar, and they may insist on it being sent back. By FedEx ground next time, please. Often shipping is actually the buyers risk, but most telescope sellers would treat ot as their own risk and make good, unless you insisted on a specific method as it appears you did here.
As far as what to do with it then, I'm sure you will find a market for someone to buy the remains, likely at a fraction of what you paid, but there are enough people out here they would like to experiment with a broken large SCT. I would.
I bought, at 1/4 the usual price, a M8 with a bad secondary coating, later found to also have been misassembled by the factory, horribly misassembled, but more than got my money's worth of fun learning how the design works, eventually turning it into a decent performer pending a recoat.
I believe there are always people looking to replace a nonworking lx200 mount, so you should be able to sell that separately for reasonable amount of money.
Tripod too, if it was part of your package. Heavy tripods are getting tough to find, and expensive.
Good luck with the claim, if not, good luck with selling the parts, they'll go.
Edited by markb, 13 July 2020 - 05:52 PM.