So, do you all ever plan on doing a complete 7.5" upper, or maybe 10.5"? Or am I just not seeing it on your website?

they do 11.5"

I pieced together an AR pistol with a 7 1/2 inch barrel about a year ago. I spoke to a call-taker for the store and asked where the barrel came from. After a minute or two they came back and said they got it from Del Ton. You can get an upper here at JSE. JSE has a number of uppers available at different pricing. All you've got to do for the SBR is find your NFA dealer for the paperwork.

Edit:
Maybe if enough interest was shown DTI would put the 7" on the retail store.