Wanted - retro mtb bits

Got a old dawes mtb project on the go https://www.lfgss.com/conversations/306014/?offset=25#comment13791116

does anyone have any of the following please? Cheap good/ open to anything

• decent square taper mtb crankset, preferably 1x
  -some v brakes (converting from cantis)
  -wide bars - they're narrower than 25.4 - not sure on the size
  -seat suited to a 90s mtb
  -mtb derailleur jockey wheels
  -7 speed mtb cassette
  
  

Thanks :)