PWM dimmers are readily available from multiple sources. I purchased this unit during the reassembly of 2511 and have found it to be acceptable.
compared to the original dimmer this thing is minuscule and will fit just about anywhere, which was my motivation for the purchase
The gray portion at the back of the switch is a self vulcanizing rubber I used to encapsulate the wiring. I found it to be very thin and feared it to be overly susceptible to be damaged
https://smile.amazon.com/dp/B0...PBC0YZYGB1Q7GZR41N85
Larry