Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

This is my fix for that style SV, but not original:

(Attachment Link)

That's a cool solution, as is your whistle base for these engines.  I hope your store is opened up again some day.  The pressure valve base would be great for steaming and then keeping the original on during display.  They would likely look really good if they were nickeled.