[DaleHCook]

Unfortunately Metcal discontinued the SP440 some years before OKi, which has made finding replacement parts more difficult. I have been able to find almost everything I need at auction. I have spares of the first two of the three filters (the paper and felt filters in the handle). I haven't seen the larger felt filter just ahead of the vacuum pump inlet. Mine is very clean, but I need to find the right felt stock at a hobby store to make my own replacements. I have a good assortment of tip cartridges and a spare coil assembly. I even have some NOS sponges (with the hole in the center). My local parts jobber had some (sold by Weller or Ungar) so I zeroed them.