Ouch, I can't believe it cracked like that...
I see several posts a month of members selling their 20inch foundry wheels. I would search the forum to see if one of them is close to you and you can buy one or more wheels. That way it is as simple as plug&play - Take the old one off, put the new...
Valet Mode on the convertible locks the entertainment system with a 4 digit pin, locks the trunk and also the middle console. Only when you enter the pin, the trunk and middle console unlock.