I need advise and help on recabling ear piece headphones

I think it's about as simple as you imagine, the links section has a bunch of parts suppliers:

http://www.head-fi.org/forum/thread/20922/diy-links-resource

I've also heard good things about:

http://redco.com/

http://www.pchcables.com/

http://www.monoprice.com/home/index.asp

http://www.meritline.com/

Disclaimer:I have no affiliation with any of these companies, nor have I ever used any of their products, so I can't vouch for any of them beyond hearsay.

I'd say that the cable length is totally up to you since you're customizing this for yourself.

I'd personally go with about 6ft (which is probably a little on the long side) per pair since you can always wrap it up (!!!) or cut it down, but you'd have a harder time lengthening a cable without a mess of adapters and extension cords. Besides, cable is (relatively) cheap per foot, but making another order for longer cable might not be worth it because of shipping and whatnot.

Do make sure that you have cable enough for both L and R if you're getting a three cable strand, you'll need the 2 cable strands and heatshrink to branch off the junction. A four cable strand might be a little easier, with some paracord housing and heatshrink to finish the look.

this thread might help explain a little better:

http://www.head-fi.org/forum/thread/461915/a-pic-by-pic-grado-sr80-recable-thread

Good luck!

I'm pretty much a beginner myself, I just do a lot of reading while I poke around things (though on this topic, I've kludged together a few headphones before), so take my advice with a gain of salt (well, maybe except this bit...lol)

But let me know if I can be of any help and how things work out!

This should be more than you'd ever need:

http://www.amazon.com/Paracord-Nylon-Cord-Rope-100ft/dp/B000S5ODNC/ref=sr_1_1?ie=UTF8&s=apparel&qid=1288280883&sr=1-1-catcorr

(just the first result for paracord on amazon)

As it's not really an electronics good, but more government or millitary use related, you could see if you have any army buddies or a surplus goods store nearby that have a few feet of it lying around, that'd probably be your best/cheapest bet. 550 cord (named for the load it can support if I recall correctly) itself has a major following that I think just spilled over into other areas. For audio sheathing use, I don't think that it's vital that you get the "REAL stuff" fake knockoff may have a coarser weave and be rated for less tension, but you shouldn't be putting that much load on anyhow.

Alternatively, any cord with a braided housing should do the same job and might be cheaper at a hardware store or something around town if you factor in shipping. (*the link I gave you has 50 ft black for $5.88 with free ship, so you'll have ...extra. Then again, you might get a fetish for it like some others, and it's a pretty good cord to have around anyhow)

Think things like shoelaces and curtain pull cords... so long as it has a removable core and you can fit your new cords in, you shouldn't have a problem