Those woofers and passive radiators will definitely need refoaming, if my experience with these carries through. Almost every time, either the surround is cracked, or it's hardened to the point to where the cone can barely move. Neither way will sound very good!
As far as refoaming, you'll need a surround SPECIFICALLY made to fit the JBL LE10. This surround has a "thinner" roll width than most 10" woofers, and will fit both the LE10 woofer and the PR10 passive radiator.
BTW: I have a buddy who has accumulated a BUNCH of LE10 foam surrounds (as in, a STACK of them nearly a FOOT tall!), from a repair shop that closed (owner retiring). If anyone wants, I can probably get some from him, much cheaper than most places want for them... he's handed me LE10 surrounds before, an inch-thick stack at the time. Anyone interested, just PM me...
Regards,
Gordon.