The original black seat covers have seen better days.I think a nice Tan colour will pop with the Beige paintwork. Any thing has to be better than original grimy black ones.
It has to be Black Gloss for the frames. As I was unable to buy a spring set for the LD seats I had to trawl the tinter web and found a very helpful site The Lambretta Club of Great Britain.On the forum a clever man described making a set of springs from a stainless steel drain unblocker. (Left)
Well lets give it a go. when cutting the the lengths l would measure the gap and take away 10mm - 12mm this would give a bit of tension after the seat cover was in place.
After cutting the drain unblocker in to suitable lengths and with the help of a good pair of pliers, I fashioned a hook at each end.
Start adding the home made springs one by one. in the end i needed two complete stets of drain unblock er.
This works a treat even if I say so myself.
http://www.shermonkel.com/