Wanted: Bars, brakes, pedals, seatpost (various parts for a single speed build)

Hi all,

I am after one or all of the following bits:

• A set of metal pedals - commuter style, preferably with reflective parts
  
• Front and rear brake callipers, long drop something like Tektro R539
  
• Brake levers for riser bars - 22.2mm
  
• Riser handlebars 25.4mm clamp
  
• 16-18T rear freewheel cog 1/8 inch (Sturmey/Shimano or equiv)
  
• Seatpost 25.8mm
  
• Saddle
  
• Edit: adding need a single speed crankset 1/8ths
  
  

Looking for low cost, purpose is for commuting so nothing too fancy. Very keen on buying a few items from one seller but equally open to one item if distance isn't too far.

Based in SE17 but willing to travel (cycling distance) to pick up.

Many thanks in advance