The same brackets fit both bodies . I ordered a new L bracket because the cheap one I had the vertical side went too high. So I was going to get the RRS L bracket but realized I would have to sell both dogs to get one. Not a bad idea really. LOL
But for 50 dollars I found one that works perfect it only goes 3/4 the way up the side with full access to doors and the button stops at the battery doors. IMHO the less metal the better instead of going all the way across this saves weight and bulk. I got it from Amazon and I'll put up a link as well.
It's made by Sunwayfoto PSL-A7IINR and it's built very well.
Amazon.com : SUNWAYFOTO PSL-a7IINR L Plate for Sony Alpha-7II a7RII Camera Arca / RRS Compatible Sunway : Camera & Photo