Happy to have a new product for your perusal, I've always found cast iron brake drums to offer the best performance for our T-Type MGs, I have used them on several of my race cars over the years (and have a set on my own car currently). The problem has always been that, let's face it, they're not much to look at, especially when compared to the Alfin brake drums (which use a liner) that are readily available.
I was lucky enough to come across a period i.e. 1930s Alfin brake drum last year as part of a job lot of parts from a notable MG collector. What struck me about it was that it wasn't a linered Aluminium casting as I'd suspect but that it was infact a steel drum with a finned aluminium casting sweated onto it. It became obvious that by mimmicking this approach it would be possible to make a good looking drum but based upon a modern factory made component with a decent lining and without the inherant problems of using a liner.
Certainly not a task I'd be willing to undertake on my own and I had, as it turns out already been beaten to it. A friend of mine had been working on a project to make a drum exactly as described. I think they look absolutely spot on, I'll be fitting a set to my own car shortly and will be able to give you a full assessment.