For people interested in a split controller method of playing on a modern console without using two full size controllers, the Splitfish Dual SFX Evolution PS3 controller looks like a fair bet.
Very similar to the old HORI Separate Controller for the PS2, this set-up enables play using split halves of, in effect, the same controller. I would imagine this would work fine with a Titan One adapter.
My personal last resort, Amazon, have a batch in presently. Worth a look.