The Jakks Paddles generally got good reviews. The Paddles are Potentiometer based so they could probably be wired to something like an Ultimarc A-Pac for PC use.
Stella supports a single mouse as two paddles using X-Axis and Button 1 for Paddle 1, and Y-Axis and Button 2 for Paddle 2.
I made my mouse paddles adhere to this convention. Two separate mice paddles, one only moves the X-Axis and the other only moves the Y-Axis. Also works great in MAME.
Google image search for 'mouse spinner' and 'mouse spinner Atari' for many different takes on mouse paddle/spinner hacks.