Hi :-)
Just something like this?
https://www.amazon.ca/Gosky-Astronomical-Telescope-Eyepiece-Extension/dp/B07CSPN8R1/ref=sr_1_10?dchild=1&keywords=telescope+extension+2%22&qid=1623443127&sr=8-10 https://www.amazon.ca/SVBONY-Telescope-Eyepiece-Extension-Protective/dp/B07R3R8Z8K/ref=sr_1_5?dchild=1&keywords=telescope+extension+2%22&qid=1623443174&sr=8-5?
Better one with groove.
Else Ontario Telescopes,Maison Astronomie, kwtelescope, telescopescanada ... :-)