Sorry if this is a little late... I've had the same problem with my Phi Touring car, up until now I've been shaving & trimming down an old stock of RCLab blades, but with this stash likely to run out soon I started looking out for alternatives.
The best I've found so far is the blades for the ARC R10 - they do need to be shaved down in thickness to 3mm (unless you open up the slot in the outdrives) & trim a little off each end using a scalpel. They seem to be more durable than the original Corally items & the RCLab parts I was using too, so all is