Skitzoid,
Why don't you give the Antonov 72/74 a go. It does have a rear ramp that opens in flight and takes about 40-50 paras on board. Basically it is a small version of the An124. I think Channel Express still has one based in Bournemouth which is leased from an European company.
http://www.airliners.net/open.file/219741/M/
Iso