This is so exciting for me, since last night I have been working on creating lots of Todds, and I have so far created seven with another one currently setting... I will tell you the process of what I did.
First of all I needed to get a mould, and I used silicone rubber for this. I mixed it with the catalyst and poured it over Todd in a spare, old butter dish bowl (this was all I had spare! It was a good size to use though) and I had the bits of card board there to help pull the mould out if needed when it was all set. It turned out I didn't need them!