That is the style of mount that you want for the LS, though on top of the seller's admitting that one of them has been welded together again, one of them appears to have a small rectangular "tab" with (2) holes in it on the top beam that I've not seen on my racks (mine are chrome, but otherwise should be the same). Â So, I am not totally certain that these haven't had some other sort of customization on them or not, but that is basically the ones you want to get.
To use the Krauser type bags instead of the BMW factory bags, you need to bolt on a couple of metal tabs on the rearmost side of the "parallelograms" where there is a flange with slotted mounting holes.  The metal tabs basically look like seatbelt tabs from a car 30-40 years ago.   I bought mine from  a company called
http://www.eurotechmotorsports.com/but NOW I see from their website that they've gone out of business. Â Â It wouldn't be too difficult to make something up, even with just a hacksaw, but I am not sure where else you might buy these things. Â The Eurotech guys charged plenty of money for them - must be they didn't sell enough tho..
For a tankbag, I use a Dowco Rally Pack Deluxe Magnetic mount tank bag. Â I see that this model is now discontinued, but they do have a similar size Rally Pack tankbag available in both strap and magnetic mount. Â The magnets on mine are strong enough to keep the thing in place even when fully stuffed, even with a leather tank cover on the R65LS. Â The deluxe model has a zipper to expand itself (I don't use that often) and it also zips off and leaves you with a plain clear map holder base, if you want. Â Â This size seems to suit the R65 tank pretty well, and I have no issues with it even with the narrow handlebars.