Hi PCA,
As others here have suggested, if your phone can be used as a remote & you could save money on it.
Alternatively, you can search for a used Logitech Harmony 650 remote which most probably supports your NAD. You can check in the link below for compatability before buying one. The prices have ridiculously shot up for a new one or is generally out of stock. It's a very good one & I have used it before. Its a bit battery hungry but I was using rechargeable sony batteries with it. Eneloop rechargeable batteries are also good.
Look for your television, stereo, dvd player or other home entertainment devices in the Harmony database
support.myharmony.com
This is the lowest & the most reasonable price for a new remote.
www.croma.com
Sorry just noticed, you purchased one for Rs. 200/-. That's the best deal you could get. You can ignore the above text in my post.