Don't know what the NTG kit is like, I did my own. MGA 1600 front hubs (steel wheel type), MGA discs and MGB callipers. Calliper mounting brackets I had machined (I think there is a programme we saved so they could be replicated). Callipers, I bought second hand genuine BMC and sent them to Brake Engineering to be rebuilt (better than the new Chinese ones about now). All that was a fraction of the cost of NTG, at the time (a couple of years back). Only issue might be getting hold of a pair of MGA hubs, they're pretty rare now. I think there are some aluminium copies out there.
Hope this is of some help.
