Thank you to all who responded to my request for help.
I was given the name of a supplier ( GS Supplies ) who has taken over patterns for this locomotive , and which are being looked at currently with a view to arriving at Casting prices .
I have not previously dealt with GS but already I am pleased with the prompt reply to my enquiry and, therefore, have high expectations of product quality and service, and perhaps a forlorn hope of economic ,as in cheap prices.
Tight screws, and regards to all