I have neighbours who is doing a loft conversion on an Edwardian semi-detached. They would like to continue the staircase using the same type of spindles and handrail as on the older part. The problem is that the spindles are "square" turned, and there does not appear to be anyone in this area (northeast of England) who does this. They have a joiner who has offered to make some for them (I think using a bandsaw and then letting them sand out the imperfections). They also found a name for a company in London which will do this for £24/spindle. The style is not uncommon, and various architectural salvage places do get such spindles occasionally. Getting the right length is the main problem--apparently currrent regulations require that the banister be 10cm taller than the original.
Michael