I have the same issue with a Gretsch Catalina and a Tama pedal. No matter how you modify the riser, the chain still has to sit outside the wooden hoop. I bought one of these beaters on ebay - a Sonor copy, and it reaches a bit further plus it has a curved felt so it can hit at an angle and still sound full.
A more drastic approach is to cut into the wooden hoop, or get a narrower hoop. You could buy a spare hoop for the batter side and make it narrower for 3-4 inches.