I have recently been having trouble selecting gears on my 2011 Saab 93 and had a search around to what the problems might be, I thought at first it was the cables binding but that didn't solve it. I had another search and came up with the bearing in the change mech. turret I bought a kit from https://x8r.co.uk/
which has now solved the problem. They also do a number of for common problems with various manufacturers car so I thought I would share this link, certainly the kit I bought seemed well made and included some of the tools needed.
Hope this helps someone.

[Edited on 21/3/20 by Schrodinger]

Good spot that

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yes some interesting bits on there by vehicle