Funny this should get picked up on five and a half years later as a couple of months ago I dug out the existing patterns, finished them off and added a couple more to finish off the set.
If you've read the original thread, I had plans for two different styles of Hoover logo but somewhere over the years the set of smaller style logo have gone missing so they are all the same now.
I have made pattern strips for the 541, 700-750, 400, 450 (can't remember if the 475 was the same), 800 and 825 (the 800 and 825's have two types, with and without reinforcement triangles!). They are mostly made from photographs and gnarly perished stumps so they are not true to life replicas, though they are pretty close.
I reckon I could put in the reinforcement strings without too much difficulty.
That doesn't mean I am anywhere near producing a finished bumper. I need to make silicon moulds from the patterns and I need a vacuum chamber to get the moulds bubble free. I made one of these a while ago but I've lent it to someone and it'll be later in the summer before it comes back.
I've also identified a much cheaper synthetic rubber than Devcon.
Not sure I'll be taking orders for these though, can't imagine there is much demand and don't think it would be cost effective to make one offs and ship them.
However, once I've got the moulds done I'll start experimenting and if they work out OK then maybe.. Watch this space.