Our vacation is saved!
Thanks to all who responded to my desperate call for help. I REALLY appreciate it!!!!!
In speaking to many people about my search for blower wheels, I happened on someone who knew a supplier near here who does specialized work. Sure enough, he has agreed to take on the job - he will make the 2 new blowers (he would not accept changing only 1) for $900. They should be ready in a week or two.
Thanks again everyone!!!