Front anti roll bar bush split after Brands & need a new one today (yeah I know its not going to happen!)

Does anyone know the front anti roll bar diameter for a STi V 1999 model? I dont carry a micrometer domestically, and there are two poss sizes of fitment :)

Guess I'll get some from Powerflex in Slough on Tues, but if anyone knows of somewhere TODAY! Damm optimist that I am!

Cheers