Yep....you buy a kit from Venhill and make your own cable...without the 90 degree bend, and just the correct length for your Cafe' bike.  It just takes a couple of cuts, a bit of solder....and "Bob's Your Uncle!".

You do need a soldering flux however that works on steel - the paste that works on copper and brass is not correct.  Acid core solder can be used - but getting the acid flux is much tidier.  I also found that it is a bit hard to tin the cable without overheating it.  It is better to put a piece of flat steel in your vice and have a molten pool of solder in the top - then apply flux to the end of the cable and roll the cable end in the molten solder.

http://www.venhillusa.com/venhill-universal-motorcycle-clutch-cable-kit.html

You might have to order a fitting or two to get the correct end fitting size.
http://www.venhillusa.com/products/cable-kits-and-parts.html

And you might want to order enough to make 2 cables....and make the second cable as a completed spare for your travel kit.

Or....you might be able to cut the clutch end off the inner cable, then pull the inner cable out, cut the 90 end off the outer cable and cut the outer cable to the length that works for you, and then and install a new straight end fitting from Venhill.  You can then put the inner cable back in and cut it to length, and install a new fitting on the end.

I buy all my custom cables from Motion-Pro including a custom clutch and rear brake cable for my savage powered café.  I have had very good luck with them.  They build exactly what I ask for.