Well, as there's been no replies or suggestions, I thought that i 'wing it' and make it up as it goes.
Below is a build outline for rear flexi mud flaps.
I'm not going to post heaps of literature, pictures talk for themselves.
Firstly, remove existing factory steel mudflaps.
Cut and remove 1 of the body/tray mounts off the chassis, as it is well in the way.
Then grind back to smooth surface and clean with thinners, ready for paint.
Fabricate a top bracket to mount and secure the rubber flap material from. To suit your tray.
Then fabricate a plate to 'hold' the rubber flap.
Dummy mount:
*You will notice, all materials and fitting are 304 stainless. Easy to work with clean.
The bolts used for the 'hold' plate are 3 x M6x16
Next step is to find the position for the plate that will suspend the flaps via chain(s).
You will have to dummy fit the flaps and work this out, based on tyre size, aesthetics and so forth.
Once you have found position, fabricate a plate and weld chain(s) on.
The last 2 pics demonstrate the use of a pickling paste on all welds. Works well.
Next, fabricate a bottom plate.
This may not be required, but i wanted to attach the genuine Toyota flaps at the bottom.
Now, set your desired chain length to make 'arch' and secure.
I secured my chains with a M5x16 bolt through the link of each to the underside of the tray.
Finished:
I ran out of sunlight, so will post a pic of the ute with them on over the next few days.
Hope this helps if anyone is contaminating doing this.
Regards
Kurt