There are many A3 Canon printers, but let me mention two, one's the cheapest and the other one of the most reliable.
1. Canon BJC-5100 is the cheapest and one of the smallest A3 printer ever. It costs around $50.
2. Canon Laser Shot LBP3500 is another reliable and affordable Laser A3 printer. It costs around $850 to $900 (prices may vary).
These are not the only available Canon A3 printer, there are many more, you'll be able to find the best suit for your needs and requirements. Almost all printer supports bonded papers (like executive bond), there's nothing to worry about, but note that some don't support Photo paper or Thick/heavy paper.
For more details visit the canon website (click here to find out more A3 canon printers)
If you need further help, let me know.
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