I redid the elastics as shown above. I cut gently with a fine blade (finer than a stanley blade) and threaded some standard elastic thread through, knotted ends in the holes. Elastic dobbins are £1 from Boyes. I used contact cement because it will hold like a demon but doesn't cure so you can get the discs off without bending them. As stated above be careful trying to take them off. They will bend easily.
The headbands I made from 3mm - 4mm Belt leather
I have a few spares around if anyone wants to buy some. lol. £16 ish for each length which will make circa 4 headbands. I made some standard length and some others that were 3cm shorter (1.5cm shorter each end.) I am using the shorter ones. If you (or anyone else) is interested are interested they I can post up the ones I have in a box somewhere and I'll sell them off cheap in the for sale section. Just costs + shipping. Should be under a tenner shipped.
The left (LP) is antique brown (love how the creases show) and the right (MP) is oiled black. I also made some Saddle tan ones. Thes 2 were my favs though.
The Paracord is cheap. A lot of Faff though. This is purely aesthetic. I just unsoldered the original cables, fed them through the paracord after removing the threads in the paracord and then heat shrunk the ends. IF you choose to do this prepare for the possibility it may take a long long time, lots of swearing and mega frustration. The second one I did quicker. The first one took many tries and quite possibly a total of 3-4 hours to get the whole cable threaded through.