9MHz has been a bottle neck for all Homebrew Transceiver project, since my school days in 1990's till today. I called the BEL officials yesterday and they gave the usual reply that they have stopped producing the coveted filter.
Building Ladder filter is another uphill task of matching and selecting a few from a bunch and then calculations. I found a shop in Czech selling matched Xtl and Capacitor set for the 9Mhz filter
http://www.ges.cz/en/inrad-351-ssb-filt ... 01966.html
Costing 600 Czech Koruna (Rs 1600). Shipping it individually would be costly. If other want the crystals, we can save on shipping and may be some bulk discount.
On the sideline, if some one has the 9Mhz Filter for sale, please drop me a small PM.