Did some digging in my catalog stash...
Be aware that some of the less expensive blades out there might list offset capabilities, but sometimes this is done by unbolting the moldboard and re-bolting it in a different position. In other words, it is not really an adjustable offset.
The Land Pride RB15 (no tilt), RBT15 (with tilt) fall into this category. Also, the RB15 blades are only rated for 40 engine HP. Your 4720 would probably bend it up like a pretzel. /forums/images/graemlins/grin.gif
The RB25 does not list any offset capabilities. It is also rated for a max of 60 engine HP. The 4720 is at the very top of that rating. I'd want a bit more safety margin than that.
The RB35 has adjustable offset capabilities, but it is only listed at 12". The RB35 has optional hydraulic offset, but only manual tilt and angle. It is also listed as having gauge wheel, skid shoe, and side plate options. The RB35 is rated for 80 engine HP.
Another interesting feature of the RB35 is that it is listed as "landscape rake adaptable". I believe this is because it shares the same main frame as the LR35 so Land Pride will sell you just the landscape rake tine frame and you can manually swap it out for the LB35 moldboard frame.
In the Land Pride lineup, the RBT40 comes closest to matching the Rhino 950 (cat I/II, weight, optional hydraulic tilt/angle/offset, 30" offset capability, skid shoes, end plates). Oddly, they do not offer a gauge wheel option on this blade.
The Rhino 800 and 950 adjustable offset capabilities are listed at 30" (more is better IMHO). Sorry, but I don't know a price on either of these blades.
BTW, note that 950 comes with all manual adjustments (tilt, angle, offset). I know you're trying to save money, but at least if you buy the 950 up front, you can add hydraulic adjustments at a later date. A lot better to do that rather than having to buy a whole new blade when you decide you want hydraulic adjustments. And I know you'll eventually come around and "want" them! /forums/images/graemlins/grin.gif