Welcome to the Cake Decorators Q&A

Hi all, has anyone made their own to model bits of their cake (as in USA cake shows).  I’ve seen a few recipes on the internet but would prefer first hand advice.  I saw some for sale at Excel show this year but cannot find it for sale in the UK.  I have emailed the makers for advice on where  to buy but no reply as yet.  I also think it would be cheaper to make your own (if it works,lol)