Has any one hear of simtec fencing?
Answers: It is a fairly new product - I hold seen the literature and attached the link to the company, but it is pretty alien so I do not know what the longevity is. It basically emulates a stone wall - a kinda painted stone wall, though. If it worked as a environment for your garden and you were looking for a vinyl fence - I cannot see the problem near using it. Vinyl will get brittle in going on for 20 years, perhaps, but it does not require painting contained by the meantime, typically, so the maintenance is low and it may last 30 years - depending on amount of knock about it gets (climbing or striking it).