The Givi top case set-up/bracket was still available as of this summer at Revzilla, with the mounting plate available at Amazon.
I bought a smaller case but there were much bigger cases available.
I loved the convenience, just not the aesthetics.
I traded mine in last month for a new (sat it the showroom 2 years) 2016 KTM Super Duke GT.
Wish I still had the 919, but 2 bikes wasn’t in the cards right now.
If you are near Northern VA, and looking for a 919, here my old 919 is:
Lots of recent maintenance and ready to ride (new: oil change, spark plugs, K&N air filter, DID chain and sprockets (15/43), wheel bearings, PCIII with custom map, Pirelli Angel ST).
The Super Duke GT is a great value right now. They never really took off in the US and updates coming for the 2019 model year so major discounts.
$3500 factory rebate and most dealers are taking even more off. $20k MSRP, I got mine for $5500 off MSRP with no dealer fees.
The GT gives you the same chassis/powertrain/soul of the Super Duke R, with more options/ammentities. Just not quite as aggressive styling.
The luggage comes off in 30 seconds for when you don’t need it and turns the bike into a Super Naked(ish).
OP, was this yours, if so, looks like it sold: