I think that this topic has come to a conclusion for me....
1/ I discussed my request with Barry (
@lankytank) who runs Metalsmiths (Leeds). Barry is always worth the time to discuss problems in the non-ferrous arena and true to form Barry came up trumps with a recommendation for a laser cutting service which is run for railway modellers (see 3/).
2/ Giles agreed to try a guillotine cut if I provided the brass. Before I got round to sending some material I received an estimate for laser cutting from the laser service as noted in 3/. I am grateful to Giles even though I have gone elsewhere.
3/ Barry recommended that I talk to
"ModelEngineersLaser" which is an on-line laser cutting service for railway modellers (from 7mm scale to 5" gauge). The website details an impressive range of parts and kits, all being laser cut parts in ferrous, non-ferrous and plastic materials. I spoke to the owner of the business and I received an estimate of £2.25 to £2.50 per part inclusive of VAT, delivery extra. I have placed an order with the company.
The ModelEngineersLaser website is worth spending a few minutes looking at. One thing that I did notice is that the company says that they have cut bar frames for US locos (
@WM183).
regards, Graham