Need help with helmet

I bought a quad bike some months ago, I live on the country side and a vehicle like that is very useful around here. But I have this problem with finding a helmet that fits me. My head is already big without my dreadlocks, but with them my head is enormous and I have not found one helmet that fits me. Have any of you guys found a solution to this problem?
updated by @peaceful-dread: 01/13/15 08:58:59PM

thats always a problem i think there are some u can get special ordered or remove some of the padding insside i dunno tho


--
My new book Ban The Taboo Vol 1