check out www.webstrings.com, they are supposed to be very good. it cant hurt to try them as well. im going to try them after my DR's die if they ever die
I use 115 90 75 60 strings for C G C F...The dropped low string is just slightly floppy, but the other 3 are nice and tight. I'd recommend some HiBeams (DR i think) or individual strings if you can't find another set in that gauge. Any round with a good solid core should do, as I've found that the size has more effect on low strings than the manufacturer. this of course is my opinion and you may find differently.
__________________
What if fat-bottomed girls do in fact make the rocking world go 'round?