I have exchanged some emails with Tom and Diana over the last year and spoken to Diana a couple of times. Tom had a severe episode (stroke, I think) about two years ago and nearly died. Plus Diana works full time for ?Boeing? Plus, they were helping a son with a roofing company. All of this means there just isn't enough of them to go around.
If you persist, you can get in touch with them and you may be able to get parts or materials. But you need to be patient.
There is a place in our hobby for someone who wants to invest a significant sum, to be able to supply the various bits and pieces our engines require, making a small profit, and putting up with a lot of hassels and complaints. Plus, must be able to do machining and be knowledgeable about all things steam. Makes you wonder why there isn't more competition, eh?
Regards, Mike