Get Rhino used to drop ship from 4x4AG, and I don't think they do anymore. I actually talked to Adrian earlier this week about the side/back nets as well, and he said John C thinks he has some nets left in storage, but not sure which ones, was going to give me a heads up when he finds out. I'll let you know as well. Other than that, the offroadconcepts.net place looks to be the main distributor.
1966 Series IIa "Olive"
2001 Discovery II
2006 LR3 HSE7
Past: 1994 Defender 90 #416, 2001 Discovery II