Any tape I use is from a company called Tesa
http://www.tesa.co.uk/
They supply all sorts of industries, I think they sell through ebay too. If you call them and ask nicely they'll send samples out, I'm not sure they're familiar with RC so it might be best to just say you need a strong double sided tape or a DS foam tape.
I think but I'm not sure that they sell through ebay too. Great tape ! Highly recommended !