The bags aren't that much different and with a bit of leather care applied they should match pretty well or you can pick up a used PAIR and install them with the money allowed and sell the left over bag.
Your insurance SHOULD cover the tow if the bike isn't rideable. Check with the company or read the policy.
If the repairs are done by a reputable dealer, you shouldn't be able to see the bike had any damage but before paying the bill, give it a close inspection.
It could have been much worse, be thankful that it is only cosmetic damage.