I ordered a new exhaust from eBay on the 19th and I just got it delivered this morning by DHL, that was super fast shipping from China. If you are interested in seeing all of the upgrades I did for my Hawk 250 RPS including the exhaust, click here to see the current list of upgrades on my Hawk 250 and links to purchase them for your bike.
You will need the make the holes bigger on the bracket. The bolts on the hawk are too far apart to fit thru the holes on he bracket. I recommend using at least a 1/2in or bigger drill bit that is for stainless steel/hard steel. I used a 3/8 drill bit and it was a pain.