Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

  Good luck with the gland packing.  Any plumbing supply store and
most hardware stores will have it in stock.  It is pretty inexpensive
and I used it with success as piston rings for my PM 1 engine.  You
can also use teflon tape, doubled over and then twisted into a string,
for small jobs like gland packing and sightglass tubes. 

  I'm sure others will add their materials and methods.

Good Luck,
Wayne