Hi, only just read your message about the neoprene as I've been away in Scotland for the week.
The neoprene I got from OW is still going strong. I made covers for both the Canon 300mm and 500mm prime lenses. I would definitely recomened it.
I don't have the product code but the stuff I got was at the bottom of this page -
Neoprene
It was 3mm thick, Hardwoods Green on one side and black on the other. I just checked and this one doesn't seem to be there now. Best thing to do is email or phone them. They were very helpful.
I'll send the rest in a 2nd message as the max size is 1000 characters!