Dirk could buy a new steel rim for $50. Have the one bent rim replaced using the existing tire & sensors. Slap on new hubcaps and be done. It would be about $75 tops. He could keep the bent rim as a spare. If he ever had a tire issue with either Mirage in the future, it could be used while a replacement is ordered. Given how rare these tire sizes are, I see some wisdom in doing this.
Can you show Dirk where he can find a set of Imola rims for $50? That would be a great deal!
A set (of 4) 175/55-15 Quatrac 5 tires are $347.92 with free shipping @ tirerack.com. I don't see this being a $400 job, unless you can point out a great deal on a set of rims for him?
He can mount 165/65-14 Vredestein Quatrac 5 on his existing rims, or he can go with countless other 175/65-14 tire options some day.