If you go to Maplins, they keep these bad boys in stock, only 2.99 for 150 springs!
There are a few in the box that fit the JLF, mine no longer feels like a cock in a sock.
Here is the link if you are interested?
I had that box about 12 months ago and was hoping to fit a spring into a default jlf spring like an ls-32 spring, but non fit or were the same size as a jlf. Maybe they changed the sizes since then, but nothing worked for me that time.
Side note:
Maplins have these things called Single pin interconnect cables.
http://img222.imageshack.us/img222/6176/5pinadapterfq2.th.jpg
Which you can use as substitute to a harness for a jlf. Probably just as expensive, if not more than a harness when you work out the price though.
Anyone know where you can buy in bulk (just the female is needed) that’s not rip-off Maplins prices?