Hi John,
There are 2 types of illuminated eyepieces.
The first (shown on the far left of the last photo) I is a Bintel 12.5mm illuminated 1.25" eyepiece. Looking for $50
https://www.bintel.com.au/product/sk...waAoGMEALw_wcB
The second (shown second from the left in the last photo) is a Rigel Systems Pulsguide 12.5mm Illuminated 1.25" Plossl eyepiece. Looking for $80
https://agenaastro.com/rigel-systems...-eyepiece.html
The illuminator unscrews on both units.