Actually your brother in law asked a friend of mine privately about this, who in turn asked me. Here is what I told him:

Alan Cann may know someone - he's contactable through caudata.org or his own site. Then there is Mark Aartse-Tuyn, one of our moderators at Caudata.org, whose wife works for the BBC Natural History unit - he has had animals filmed before and may know where to look. Lastly, there is Marc Staniszewski, who can be contacted through dartfrog.co.uk. I wouldn't hold out much hope for any of them to have them though, but since Mark A-T is friends with both and has great contacts in the UK, he is probably the best person to ask.