Purchased from Hardware outlet - this item

http://www.ebay.co.uk/itm/Handrail-Bracket-to-Suit-Modular-Handrail-System-42-4mm-Dia-Stainless-Steel-Tube-/360578012588

Perfect as-new condition

I changed the design of the stainless rails I put up in the summer and didn't get around to returning the odds and ends I had left over, so if you need one of these, save yourself a few quid.

I have some other handrail fittings also listed (upright support and endcaps).  If you want any of these I'll combine them and charge the same postage as for one item.