http://www.google.com

but since you're new...

http://www.sheldonbrown.com/harris/tires/590.html

not a super common size, your options are limited, particularly with the white wall specification, but it looks as though Schwalbe does make one.

as for what larger sizes may be possible, we would need to know a little more about the intended rims, not just the current tire size.

hope this helps.