I am loosing hope honestly...not Because I didn't find a LLLL.com, i found 3 (after too many attempts) but godaddy simply put it in premium with a huge price, since it is out of the budget of the OP i will mention it here
kewv.com PREMIUM $2,628.00
kewh.com PREMIUM $4,788.00
kewx.com PREMIUM $4,788.00
kewt.com PREMIUM $15,000.00 (so cute price)
coln.com PREMIUM $15,000.00
dotm.com PREMIUM $20,000.00
Edit3: added another one
Interesting. These actually resolve to IPs, and appear to be owned by GoDaddy themselves, likely so that they can resell them at the above listed outrageous prices. There are actually a handful of 4L.com domains which give NXDOMAIN, but the WHOIS result always shows that someone has already registered it.
Same thing with the rest of the domains, they are registered under those big registrars. I have tried searching for bitcoin domains lately and found some on namecheap but didn't buy it but when i returned to check whether its still viable for I have decided to maybe I can use the domain, found out its already registered and I have to order it back.