twix

Shifter cables on my 91 MR2 turbo broke recently-have been told that new ones are not available anywhere in US. Replaced with ones from wrecking yard. Doesn't engage 3rd gear as before. Told by mechanic that there is no adjustment to cables. So seems that I am stuck with less than had prior to the one cable of two breaking. Would appreciate any advice. Would like to purchase new replacements if anyone knows where to get them. Thanks-just not as much fun to drive as was. Sad