Yikes. That's terrible news. This seems like it's gonna be a **** nightmare lol; changing the stock bars.
I like the risers you picked out. They wouldn't work for what I want to do but I do like them. I want to do something like this on the Street with a new bar:
Street Slammer Bar-55985-10 | Handlebars | Official Harley-Davidson Online Store
Sadly though that ONLY works with a 1" bar and NOT a 7/8" bar like on the Street.
So...... I either install a big riser THEN add a drag bar with extended reach for the same look, or find that bar in a 7/8" fit (which to this point I have not been able to find; have found similar looks but not close enough and all "close matches" to me look terrible).
For risers, I have found this from drag that I like for the purpose and the rise:
HANDLEBAR RISER/TOP CLAMP KITS | Products | Drag Specialties®
(using that 7/8" to 1" converter you identified)
RISER 5 ROX PIVOT ELITE B | Products | Parts Unlimited®
This is 7/8" and would work with the drag bar made for the Street. So I may go this route.
I basically like the height of the bar ends now, maybe a little higher as that would bring your hands Uganda straighten your back for a better posture and a more relaxed feel, but with a straight across look without the "middle dropping down."
There is also a company from India that supposedly makes a 7/8" TBar as well that I am looking into; who knows lol.
That is where I'm at with his so I am really interested in following along with your mod as well. The only other option is to have a MC customization shop just make me a "custom made" TBar like I want but that would be a last resort.
At any rate thanks for the feedback and let's work together to get this sorted. By the way, there may also be an option on Webike from Japan for 7/8" bars made for European bikes.