There are some tools and accessories that are either too large or too specific to individual needs to keep in stock. I have been able to make virtually anything that has been requested. Typically a sample to follow is perfect for custom items but in some cases discussion and a drawing (on my part) does the trick.
Some examples of items not regularly stocked are:
Spinning wheel bobbins. Different manufacturers have different dimensions so having a sample is ideal, but a bit of measuring will do the trick.
Any parts or repairs for spinning wheels. So far, I have had no problem replacing parts that are otherwise unavailable.
Tabletop swifts. I have a model that I make but it’s not that much in demand. It is fully adjustable and spins very easily on a ball bearing.
Any specific requests for either drop or supported spindles. Sometimes people have a request for significantly heavier spindles for plying.
Tapestry beaters. I have some had cut all-wood models (4 TPI) and will have a model that uses reeds for teeth, so more variations in pitch.
Tapestry bobbins. I have recently started making these so may keep them in stock.
Anything that you may need but can’t get. I have a background in making whatever it takes to do a job. If you can imagine it, I can probably make it.