| Business | Phone |
| Associated Drafting 45 Front St, Trenton K8V 4N3 | (613) 394-4335 |
| Loch & Assoc Inc 7 Metcalfe St, Trenton K8V 6H3 | (613) 394-4224 |
| Loch & Assoc Inc 149 North Murray St, Trenton K8V 6R6 | (613) 394-3363 |
| Candraft Detailing 40 Frankford Cres, Trenton K8V 4L2 | (613) 392-1882 |
| Martin Drafting & Design Studios 114 Byron Street, Trenton K8V 2Y4 | (613) 394-3800 |