That is correct Mark. The one for the telescopic forks has not got the slot for the bolt to pass through and is less than half the length of the girder fork one.
I had a complete telescopic fork damper so after having the part made it was just a case of cutting the rod to length and welding it in.
There was a girder fork damper on eBay recently which I did try to buy but missed out. Fortunately my problem is now solved.
Well look at the knob of the Indian replica, it's not the correct shape like the original. Look closely at the 'teeth'on the side and compare them with an original. It's always easy to spot an Indian damper knob.