I'd be interested to see pictures of the boiler you've got. I know nothing about Inglis boilers, but the paddle steamer "Maid of the Loch" was built by A&J Inglis of Pointhouse Glasgow. The original boiler has gone though I believe.
What size is your boiler? What's it made of? Is it working?
I am unable to send a photo you could see a photograph on the model mayhem site as I am able to post there. The boiler is not yet finished hence the desire for the photograph, it looks well made but will require testing as the next step. Its some size at 11" long 5" diameter. Mark