Hi TommyMcMusic,
A warm welcome to our community 
I'm sorry to hear you've not had any luck in finding the correct code for this TV so far. I just wanted to pop our online Remote Control Guide incase you've not seen it yet and hope it may help.
If we don't have the correct code that's as far as we can assist. The advice given to you by Toshiba is not entirely correct. For the box you have there is only 1 type of remote control so it's a matter of finding the correct code of the make/model of the TV set. We do try and keep our list of codes up to date as frequently as we can but as codes are coming out all the time across the many brands around we don't always have the latest, especially if the TV set is brand new or newish.
If in the event you need to get back in touch with Toshiba support then feel free to direct them to this post which may help them understand what's happening.
I hope you have some luck with the guide, keep us posted on how you get on.
Collette