Not to my knowledge. 2" chopped and standard seems to be it. It shouldn't be hard to do yourself, especially if you bought an un-plated one. Even if it was plated, you could re-install the angled threaded piece inside with JB Weld. 3" is the usual chop when you want a little more chop than the 'standard' 2". A 4" chop strikes me as a little extreme though. Measuring the windshield center on my 2" chopped 32 roadster shows 7". A 4" chop would be 5" and the view would be highly compromised if you ran a top. If you're say . . . a 6' tall or so guy, you'd be hard pressed to get the seat low enough so that you were actually looking through the windshield instead of over the top. Being radical can be cool, but practicality enters the scene as well....
I agree ... With a 4 inch chop ... I would be way above the windshield and in the wind and my seat is lowered 2 and 1/2 inches from the original seat.
The frame is easy to cut. This was a stock frame that I cut to match the 2" repro posts. Cutting and welding the posts shouldn't be too much of a problem...the chrome bill for the posts is what scared me.
I used to run a 2" and several years ago went to a 3". I bought it from Barry Lobeck........ Click to enlarge. Click twice for full size.