Till date, I haven't found strings that won't fit. :-)
I have a Master set that is cut to length (with max amount of windings around the tuner)
I use this set to cut the new strings to the right length.
This is with a ADGC set (130-110-90-70)
My preferred strings are Stainless steel roundwounds (R.Cocco)
Best strings I've tried were Gali Saturn signature sets, nickel plated roundwounds. By far the best tone and strong/tight low B string (extremely impressive on my Elan)
Downside: They're extremely hard on the fingers, one gig with my Spoiler playing finger style and I had a hole in my finger that almost reached the bone... :-(
Also they're pretty expensive over here...
For recordings and high profile gigs, I will put them on my Elan again though. I only play with a pick on that bass and I have a hefty stash of them :-) (picks)