EDIT
There is a cleaned up edition of the Shuowen where a scholar has gone through and updated mistaken etymologies:
http://www.amazon.cn/%E8%AF%B4%E6%96%87 ... 567&sr=8-1
It contains the complete original, so it's hard to see using another edition, except that the original by itself, if already typed in, would be cheaper.
He also has a volume out covering just the 540 radicals, and a 14 volume set of documents, and something else I think. These have been out for a few years now.
If folks really wanted Kangxi, 漢語大詞典出版社 came out with a modern printed version a few years ago (retyped, not a photo reprint of an old edition), which I suppose you could license. How faithful the 21st century printed forms are to the original printed forms, I can't say since I haven't sat down to compare them.
That last point may be the source of a new thread . . .