Snowblower Motor driveshaft

[C.Lesco]

So we bought the snowblower motor from andymark but didn't buy the sprocket we needed since at the time we didn't know it was a unique axle design nor did we know we would need a sprocket in the future. With the current canadian exchange and shipping it would take 100$ to order a small sprocket with the 10mm DD bore junk for an axle slot. Does anybody know of any cheaper and reliable sources for something like this? (25 series sprocket)