You may struggle to find the exact correct forend for this gun as Scott tended to use their own forend catch or one of its variants. They certainly exist but are usually attached to a gun!
Furthermore, the catch, which is similar is design to a Deeley catch, is located at the end of the forend rather than the middle like a Deeley so the loop will be further along the barrels that one for either an Anson or Deeley forend.
To use either one of the more common catches, you might have to relay the ribs to position the loop closer to the action.
Don't want to rain on your parade but you have yourself a challenge!