Where should I look for instructional designers for an online training company?
The answer depends on your location and the subject matter which you need training developed for. If you want to develop a level 1 Interactive course you can go with any freelancer or company who provides Level 1 interactive courses? You can find them on Google or any freelancing websites.
Instructional design becomes very complex when it comes to level 2 & level 3 Interactivity, here you will require a specialist in the field where I won’t suggest you to go with a freelancer. Rather hiring the best in the market Instructional design Company would be great option for you.