This proposition is very difficult as it involves Central Railways approval. The entire route of Kutch Express /9131 falls on Western Raliway so it is most unlikely that for a few 20-25 kms only on CR and the rest on WR will be acceptable to both Rly Zones. At the best, it can be proposed to be started from Dadar Mid Town Terminus, a newly opened terminus. However at best it can started from Borivali as it also has now a new platform 6 & 6A.
These things apart, nothing is possible through this website as this is not affiliated to Railway deptt and this is independent private website.