https://www.toyodiy.com/parts/p_E_200301_LEXUS_IS200~300_JCE10R-AEAVFW_8701.html you will find the part number here - think its this one
87810-53080-B0
W(SPORTS PACAGE) & W(AUTO ANTI-GLARE MIRROR), MD.CHARCOAL, TRIM2*
312-1170L-ASH7 and 312-1170R-ASH7 show up on ebay - my only concern is that the mountings may not be exactly the same on European models - you would need to check carefully and also the lights themselves will be to US spec rather than UK (bulbs pointing in wrong direction, light intensity etc.)