Replacement /new operator
Thanks for writing in! Your skylight operator appears similar in style to our 39-379 Skylight Operator. It is a bit different in design, so I cannot guarantee that it will work as a replacement. That said, take a look over the dimensions and design and compare it to your operator to determine if this could work for you.
Your operator appears to use the 39-247 Eyelet Adapter. Another replacement option is the 39-336 Universal Joint With Pole Ring.
The installation bracket on the end of our chain would not be compatible with your existing bracket, you would need to remove it to install this skylight. Our operator does not use any other attachments.
When comparing the dimensions, the most important measurement to confirm would be the distance between the installation holes, shown as 1-5/8" on the diagram above.
From what I understand, Insula-Dome Skylights has gone out of business, so I am not sure that any other retailers would be able to supply you with a direct replacement.