Since then I was using a mod with the magnet & looking around for a proper metal bass pedal. Most bass pedals are pretty expensive at £30+ so took me a while to find one at a good price for modding.
I was going to buy a normally closed alarm door sensor as this does the job the original rockband sensor does.
I then thought that as the sensor was still working why not open up the rockband pedal and use it.

First thing you need to do is open the rockband pedal.
One thing I noticed on mine was there are some rubber parts on the bottom which are glued on, these are pretty stubborn but if you can get under them you can get to the 4 screws.
Once you have removed the screws, remove the cover from the top and you will see the sensor.
Mine seemed to be held in by 2 really small bits of plastic which were easily removed with some sidecutters.

Once you have the sensor you will need the Magnet from under the pedal (4 screws on the orange leaver will get this out)

Next important part is to remove the beater from the pedal.

So now you should have a Sensor (with wire still attached) and a Magnet.
All you need to do is work out the best place to put these on the pedal.

I put the magnet in the center of the pedal and the sensor mounted directly beneath (they do not need to touch).

That’s basically it.
Might take a while to get the placement of the magnet and the sensor right but once it’s all done plug it all in and start drumming.

Basically got some circular foam pads which have a adhesive side.

The main thing is to make sure you clean the pads before sticking the foam onto them as otherwise you may find the foam doesn’t stick very well.
I used lighter fluid to clean mine as then I knew it would be dry after. (also I have some for cleaning heatsinks)

Another thing which really makes a difference to playing is getting some proper drum sticks. I am currently using some 5AN (nylon tip) ones.