There is a WW2 Para reenactment group that organise parachute training for the anniversary drops at Arnhem and I think they might know the answer to your question.
I can't rember which group it is but I think if you contact this group via their e-mail they will point you in the right direction
[email protected]
the website is
http://www.summerof44.org.uk/
If I find the name of the organiser of the training I'll let you know.
H1HU