ive had good results from Extracta's "Stainaway" on various customer stains.
i tested a whole batch of different stains like ink , red wine, coffee, tea, curry. blackcurrent juice on an 80/20 offcut in beige that i had and it got the lot out with no bleaching. Dont know if this stuff is similar to the Chemspec stuff as ive not used any others yet.
Martin