[See photos]
I have an outlet on the wall of the stairs that has two switches (different sets of lights). The left switch was a round dimmer type switch. Push on/off and rotate to dim (infrequently used).
I snagged it with a package and broke the little round knob off (broke the metal pin, not just the knob coming off).
Would like to replace/fix it. Went to the local big box, but they did not have that sort of outlet or switch. And I hate those little slider dimmer things next to switches (always end up dimming when you don't want to).
Is there somewhere I can order a replacement part? (either pin or entire outlet)? Like on the Internet? [I have never done this...so sorry the stupid question...I just cried when Home Depot failed me.] Failing that, could I just make it two regular switches (no dimming)? I hate, hate the little slider things next to switch that always dim when you didn't mean to touch them.
Note: I am very home improvement, tools, and electricity stupid. Can follow directions though if I buy something and have put in new lights and stuff (with difficulty)
EDIT: After action. TLDR: replaced with a new switch, fine. Details: Thanks for the answer and comments. Tried the JB Weld (had to buy some), but no joy...it's got too much tangential forces on it and also, hard to clamp/hold the pieces to set properly. Rewiring was fine. I could have used a single pole, but the enclosed directions were clear on how to use it for single pole application. Thanks for the comments on pictures and breakers. Really easier than I expected!

