I have fitted one to my WM250V-F; it was one I had fitted to my previous machine, a Clarke C500 combo, Warco also said that they could provide one but would require to be machined out (at extra cost of course). Considering I already had the QCTP plus 10 holders I wasn't going to pay for another set so I set about modifying my machine to suit.
What I did was to machine the boss off the compound slide & scraped the casting flat to ensure the QCTP sat flat on top, I initially made a sleeve to fit the bore of the QCTP as it was made to fit a Myford stud but then decided to machine a new stud to fit the QCTP proper. This gave me the opportunity to see what sort of assembly methods the Chinese 'Technicians' used at the factory.. as found the original tool post stud hadn't even been faced off & had been press fitted into the compound slide, the anti rotation pin had been drilled by hand, at an angle, & a 'bit' of a roll pin 'bashed in'

. Having made the new stud I drilled a new anti rotation pin hole vertically on the joint line, tapped it 4mm & fitted a grub screw with a drop of thread locking compound. I finally drilled two other anti rotation / locating holes into the compound slide spotting through from the QCTP tool post. To date it has served me well, should I need to use the original tool post (not so far as I much prefer the QCTP) all I would need to do is machine up a dummy boss to fit the original tool post.
As the 240 & 250 are not too dissimilar the compound slides are the same so you shouldn't have any difficulty modifying it to suit the QCTP you have /intend to buy. Drop me a pm if you need any further help.