I believe
Kuryakyn (and perhaps others) has both non-adjustable chrome wide levers (for Valk) that are straight bolt ups, as well as adjustable chrome levers (that are just as wide) for 1800 wings that need the tab cut off.
Here are the instructions for modification of the 1800 adjustable levers. (Pay attention to the note at the end about having your brake light switch sticking on briefly after letting off the lever, I had the same problem)
http://forums.delphiforums.com/valkyrie/messages/?msg=13360.1The link to
Wingstuff levers (made by
Add On) does not work anymore.... here it is.
http://wingstuff.com/products/36601-adjustable-wide-brake-clutch-levers-for-gl1800?from_search=1The
Kuryakyn part number is # 7436.
I think
Show Chrome also makes a set.
The wide non adjustable chrome levers from
Kuryakyn are part number # 7429

IMHO, even with small hands, the wide chrome non-adjustable levers are nearly as good (shorter reach than stock) as the adjustable levers (except perhaps on the one or two shortest reach settings).