Stretching the Frame 23"

I’m stretching my THINK 23" to accommodate my full size powered wheelchair. All’s going well, EXCEPT l can not locate a longer PARKING brake cable. I wish to stay stock, stock handle, stock rear cable mount, etc. There are many aftermarket methods, Lokak, hydraulic, etc. The current Factory cable is 35" 25", off what appears to be a Ford Escape. Any help? Do you know anyone that’s been down this road before that l may contract? Thank you, Mark.

Weld a rod extending the center bracket that attaches to the stock cables.