Glad to be of some help, I used this company approx 2 years ago.
I still have a unused classic keyfob, don't know if you are interested, but I will let it go for £35 inc recorded postage.
The frequency will need to be the same as yours, I will double check mine if you are interested.
I still have the original receipt, instructions and bag that it came in.
If was also a feature in one of the Land Rover Mags, I can copy this for you as well.