I created my own “no-heat” peppers like Habanada this year if you or others are interested in trialing some. I was trying to create a no-heat pepper in a small form like Aji Charapita with mixed success.
I did get a few small ones I’d like to grow out next year F3 generation which might be ‘not hot’, but I got some nice medium-large “not-hot” peppers (and i guess a few small-medium sized peppers).
I grew out about 128 peppers and had 150 others growing for me (unfortunately out of which 10-20 people were decent gardeners capable of growing a veggie plant to adulthood 
) ).
https://growingfruit.org/t/developing-a-hybrid-pepper-free-seeds/52388
I had a bit of a grow log below (although I prob need to update it with 30 more varieties pictures):