Pretty easy to fit a pressure switch, around £10 IIRC and you just put it in in place of one of the banjoes. You''ll need to rebleed after as well obviously.
I'm planning on going with the Woodcraft ones... I'm liking the interchangability- you can just use their backing plates and all other stock parts if you want risers (not cheap, but pretty) or you can mount their solid pegs on a stock plate, or their levers on an all-stock footrest setup, or any other combination therein. Clever. Especially when (like me) you have a hoard of spare stock levers just in case you bin it again
And unlike some of the other companies, the parts are a piece of cake to source in the event of damage.
Not cheap though... Though it works out not bad if you import them from 2WJ, it seems.