3-way throttle cable splitter

[NYSingh]

Re-doing my throttle cable using the Venhill custom cable kit (OEM is too long with clubman bars), but having trouble locating a 3-way throttle cable splitter box/junction to work with the 2 carbs + oil pump. Seems my options are:
1) find a 3-way splitter
2) use a 4-way splitter (with only 3 of the splits being utilized)
3) modify the OEM splitter

Option #1 would be the easiest, but I can't seem to find any except for an Amal 244/2080 splitter https://steadfastcycles.com/products/copy-of-junction-box-splitter-triumph-norton-bsa-amal-throttle-cable-union-244-104-1-2 - maybe that will work?

Option #2 is easier to find, but not sure if using just 3 of the slots would cause splitter to pull the cables unevenly.

Option #3 may work but I haven't opened it up yet so can't tell.  Looks like it's held together with some rivets, so would have to grind these off then figure out how to re-attach it after I make the new cables.

Has anyone had to do this before and have some ideas?

[DesmoDrew]

Why don't you just shorten the 'throttle' side of the cable assembly and stick with the stock splitter and 'lower' cables? 

[NYSingh]

 ...genius!  I'll try that first and come back with more questions when I screw it up.