The 'Let's Trade' discussion

have had 98% (*) of a bike sitting in my front hall for a month now and it's driving me nuts.
Looking for:

• a short A-head stem with an oversize clamp and
  
• a crosstop brake lever, also with a 31.8mm clamp.
  
  

going spare:

• an 80mm ambrosio venturi road stem (26mm), quite nice and light (122g)
  
• a Campag 49t 1/8 chainring practically unused
  
• (somewhere in piles of stuff) 17t 3/32 cog, nothing fancy like EAI or phil but perfectly ok.
  
  

(*) by weight