You can find a list of parts at the following link:
https://toothygrins.net/collections/hydro-floss-oral-irrigator-and-parts-and-accessories
The HydroFloss parts you can find include but may not be limited too:
reservoir hydrofloss part
plastic insert hydrofloss part
0-ring HydroFloss part
HydroFloss regular jet tips
HydroFloss pocket pal jet tips
Hydro Floss cannula tips
Pump
Hose Assembly
If you need lids and holders, feel free to call the above number for those parts as well.
https://toothygrins.net/collections/hydro-floss-oral-irrigator-and-parts-and-accessories