Fretnation has super long scale pressurewounds custom made for them by GHS.Just the Supers. You have a lot more options since they only go up to 35" on the B, but you still have to be careful, and I guess it is important to match the Dingwall gauges (which I did with this set, but didn't with the flats as there were limited options).
GHS Pressurewound Nickel-Iron Bass Strings Super Long Scale - 5-String
Custom Made for Fret Nation: GHS Pressurewound Nickel-Iron Bass Strings Super Long Scale - 5-String 44-128 39.25" Winding .044 .062 .080 .102T .128T GHS Pressurewound Bass Strings are made from GHS's exclusive Alloy 52, a magnetically active material designed specifically to increase the...
I threw a pair on a NG like 6 months ago hoping they'd be like bass boomers (they're not). I really hated them at first but went away for a month shortly thereafter. When i got back i loved them and they're still on that bass (go figure!).
It's getting to the point Ill probably swap then out soon though. I have another set but I'm thinking about trying the Dunlops next on the NG & swap out dingwall nickels for steels on the Z. Lots of string options these days.